1661002848 has 120 divisors (see below), whose sum is σ = 4907077560. Its totient is φ = 551162880.

The previous prime is 1661002843. The next prime is 1661002859. The reversal of 1661002848 is 8482001661.

1661002848 is a `hidden beast` number, since 16 + 610 + 0 + 28 + 4 + 8 = 666.

It is a super-2 number, since 2×1661002848² = 5517860922128222208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661002843) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 623343 + ... + 626001.

It is an arithmetic number, because the mean of its divisors is an integer number (40892313).

Almost surely, 2^1661002848 is an apocalyptic number.

1661002848 is a gapful number since it is divisible by the number (18) 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 1661002848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2453538780).

1661002848 is an abundant number, since it is smaller than the sum of its proper divisors (3246074712).

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

1661002848 is a wasteful number, since it uses less digits than its factorization.

1661002848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922 (or 2905 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1661002848 is about 40755.4026847975. The cubic root of 1661002848 is about 1184.2865373582.

The spelling of 1661002848 in words is "one billion, six hundred sixty-one million, two thousand, eight hundred forty-eight".