76916681 has 4 divisors (see below), whose sum is σ = 77843472. Its totient is φ = 75989892.

The previous prime is 76916659. The next prime is 76916683. The reversal of 76916681 is 18661967.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18661967 = 739 ⋅25253.

It is a cyclic number.

It is not a de Polignac number, because 76916681 - 2²⁶ = 9807817 is a prime.

It is a super-2 number, since 2×76916681² = 11832351632111522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76916683) 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, 463271 + ... + 463436.

It is an arithmetic number, because the mean of its divisors is an integer number (19460868).

Almost surely, 2^76916681 is an apocalyptic number.

It is an amenable number.

76916681 is a deficient number, since it is larger than the sum of its proper divisors (926791).

76916681 is an equidigital number, since it uses as much as digits as its factorization.

76916681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926790.

The product of its digits is 108864, while the sum is 44.

The square root of 76916681 is about 8770.2155617750. The cubic root of 76916681 is about 425.2785827501.

The spelling of 76916681 in words is "seventy-six million, nine hundred sixteen thousand, six hundred eighty-one".