76399965 has 24 divisors (see below), whose sum is σ = 136700928. Its totient is φ = 39431520.

The previous prime is 76399963. The next prime is 76399979. The reversal of 76399965 is 56999367.

It is not a de Polignac number, because 76399965 - 2¹ = 76399963 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76399963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25989 + ... + 28778.

It is an arithmetic number, because the mean of its divisors is an integer number (5695872).

Almost surely, 2^76399965 is an apocalyptic number.

It is an amenable number.

76399965 is a deficient number, since it is larger than the sum of its proper divisors (60300963).

76399965 is a wasteful number, since it uses less digits than its factorization.

76399965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54809 (or 54806 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The square root of 76399965 is about 8740.7073512388. The cubic root of 76399965 is about 424.3241206409.

The spelling of 76399965 in words is "seventy-six million, three hundred ninety-nine thousand, nine hundred sixty-five".