76686513 has 4 divisors (see below), whose sum is σ = 102248688. Its totient is φ = 51124340.

The previous prime is 76686509. The next prime is 76686517. The reversal of 76686513 is 31568667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (76686509) and next prime (76686517).

It is a cyclic number.

It is not a de Polignac number, because 76686513 - 2² = 76686509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76686517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12781083 + ... + 12781088.

It is an arithmetic number, because the mean of its divisors is an integer number (25562172).

Almost surely, 2^76686513 is an apocalyptic number.

It is an amenable number.

76686513 is a deficient number, since it is larger than the sum of its proper divisors (25562175).

76686513 is a wasteful number, since it uses less digits than its factorization.

76686513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25562174.

The product of its digits is 181440, while the sum is 42.

The square root of 76686513 is about 8757.0835898717. The cubic root of 76686513 is about 424.8539530477.

The spelling of 76686513 in words is "seventy-six million, six hundred eighty-six thousand, five hundred thirteen".