6761491920 has 120 divisors (see below), whose sum is σ = 22725021696. Its totient is φ = 1801661184.

The previous prime is 6761491901. The next prime is 6761491939. The reversal of 6761491920 is 291941676.

6761491920 is a `hidden beast` number, since 6 + 7 + 614 + 9 + 1 + 9 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (6761491901) and next prime (6761491939).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1194537 + ... + 1200183.

Almost surely, 2^6761491920 is an apocalyptic number.

6761491920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6761491920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11362510848).

6761491920 is an abundant number, since it is smaller than the sum of its proper divisors (15963529776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6761491920 is a wasteful number, since it uses less digits than its factorization.

6761491920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329 (or 7320 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 6761491920 is about 82228.2914817035. The cubic root of 6761491920 is about 1890.9534787579.

The spelling of 6761491920 in words is "six billion, seven hundred sixty-one million, four hundred ninety-one thousand, nine hundred twenty".