76320715665 has 16 divisors (see below), whose sum is σ = 125413501248. Its totient is φ = 39604262976.

The previous prime is 76320715661. The next prime is 76320715697. The reversal of 76320715665 is 56651702367.

It is not a de Polignac number, because 76320715665 - 2² = 76320715661 is a prime.

It is a super-3 number, since 3×76320715665³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (76320715661) 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, 68756847 + ... + 68757956.

It is an arithmetic number, because the mean of its divisors is an integer number (7838343828).

Almost surely, 2^76320715665 is an apocalyptic number.

It is an amenable number.

76320715665 is a deficient number, since it is larger than the sum of its proper divisors (49092785583).

76320715665 is a wasteful number, since it uses less digits than its factorization.

76320715665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137514848.

The product of its (nonzero) digits is 1587600, while the sum is 48.

The spelling of 76320715665 in words is "seventy-six billion, three hundred twenty million, seven hundred fifteen thousand, six hundred sixty-five".