76871681 has 16 divisors (see below), whose sum is σ = 83276544. Its totient is φ = 70766784.

The previous prime is 76871657. The next prime is 76871687. The reversal of 76871681 is 18617867.

It is a cyclic number.

It is not a de Polignac number, because 76871681 - 2⁶ = 76871617 is a prime.

It is a super-2 number, since 2×76871681² = 11818510679531522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76871687) 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, 87215 + ... + 88091.

It is an arithmetic number, because the mean of its divisors is an integer number (5204784).

Almost surely, 2^76871681 is an apocalyptic number.

It is an amenable number.

76871681 is a deficient number, since it is larger than the sum of its proper divisors (6404863).

76871681 is a wasteful number, since it uses less digits than its factorization.

76871681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040.

The product of its digits is 112896, while the sum is 44.

The square root of 76871681 is about 8767.6496850638. The cubic root of 76871681 is about 425.1956303514.

The spelling of 76871681 in words is "seventy-six million, eight hundred seventy-one thousand, six hundred eighty-one".