7680666738 has 32 divisors (see below), whose sum is σ = 15415142400. Its totient is φ = 2551270400.

The previous prime is 7680666737. The next prime is 7680666743. The reversal of 7680666738 is 8376660867.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7680666737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3099556 + ... + 3102032.

It is an arithmetic number, because the mean of its divisors is an integer number (481723200).

Almost surely, 2^7680666738 is an apocalyptic number.

7680666738 is an abundant number, since it is smaller than the sum of its proper divisors (7734475662).

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

7680666738 is a wasteful number, since it uses less digits than its factorization.

7680666738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The square root of 7680666738 is about 87639.4131541283. The cubic root of 7680666738 is about 1973.0267521631.

The spelling of 7680666738 in words is "seven billion, six hundred eighty million, six hundred sixty-six thousand, seven hundred thirty-eight".