6640369674 has 16 divisors (see below), whose sum is σ = 13281898080. Its totient is φ = 2213263440.

The previous prime is 6640369661. The next prime is 6640369741. The reversal of 6640369674 is 4769630466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38112 + ... + 121380.

It is an arithmetic number, because the mean of its divisors is an integer number (830118630).

Almost surely, 2^6640369674 is an apocalyptic number.

6640369674 is an abundant number, since it is smaller than the sum of its proper divisors (6641528406).

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

6640369674 is a wasteful number, since it uses less digits than its factorization.

6640369674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96565.

The product of its (nonzero) digits is 3919104, while the sum is 51.

The square root of 6640369674 is about 81488.4634411522. The cubic root of 6640369674 is about 1879.5941550760.

The spelling of 6640369674 in words is "six billion, six hundred forty million, three hundred sixty-nine thousand, six hundred seventy-four".