6740666640 has 160 divisors (see below), whose sum is σ = 23267260800. Its totient is φ = 1793687040.

The previous prime is 6740666599. The next prime is 6740666663. The reversal of 6740666640 is 466660476.

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

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 31 ways as a sum of consecutive naturals, for example, 1096375 + ... + 1102505.

It is an arithmetic number, because the mean of its divisors is an integer number (145420380).

Almost surely, 2^6740666640 is an apocalyptic number.

6740666640 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 6740666640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11633630400).

6740666640 is an abundant number, since it is smaller than the sum of its proper divisors (16526594160).

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

6740666640 is a wasteful number, since it uses less digits than its factorization.

6740666640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6662 (or 6650 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 6740666640 is about 82101.5629571082. The cubic root of 6740666640 is about 1889.0101140397.

It can be divided in two parts, 6740 and 666640, that added together give a triangular number (673380 = T₁₁₆₀).

The spelling of 6740666640 in words is "six billion, seven hundred forty million, six hundred sixty-six thousand, six hundred forty".