76665 has 16 divisors (see below), whose sum is σ = 129600. Its totient is φ = 38592.

The previous prime is 76651. The next prime is 76667. The reversal of 76665 is 56667.

76665 = T₁₂₆ + T₁₂₇ + ... + T₁₃₄.

It is not a de Polignac number, because 76665 - 2⁴ = 76649 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (76667) 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, 151 + ... + 419.

It is an arithmetic number, because the mean of its divisors is an integer number (8100).

2⁷⁶⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

76665 is a deficient number, since it is larger than the sum of its proper divisors (52935).

76665 is a wasteful number, since it uses less digits than its factorization.

76665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296.

The product of its digits is 7560, while the sum is 30.

The square root of 76665 is about 276.8844524346. The cubic root of 76665 is about 42.4814220994.

It can be divided in two parts, 76 and 665, that added together give a triangular number (741 = T₃₈).

The spelling of 76665 in words is "seventy-six thousand, six hundred sixty-five".