76997665 has 8 divisors (see below), whose sum is σ = 92445480. Its totient is φ = 61565952.

The previous prime is 76997659. The next prime is 76997693. The reversal of 76997665 is 56679967.

It can be written as a sum of positive squares in 4 ways, for example, as 57699216 + 19298449 = 7596^2 + 4393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76997665 - 2⁹ = 76997153 is a prime.

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, 13231 + ... + 18139.

It is an arithmetic number, because the mean of its divisors is an integer number (11555685).

Almost surely, 2^76997665 is an apocalyptic number.

It is an amenable number.

76997665 is a deficient number, since it is larger than the sum of its proper divisors (15447815).

76997665 is a wasteful number, since it uses less digits than its factorization.

76997665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8051.

The product of its digits is 4286520, while the sum is 55.

The square root of 76997665 is about 8774.8313374104. The cubic root of 76997665 is about 425.4277861047.

The spelling of 76997665 in words is "seventy-six million, nine hundred ninety-seven thousand, six hundred sixty-five".