77165641 has 12 divisors (see below), whose sum is σ = 89927760. Its totient is φ = 66021480.

The previous prime is 77165629. The next prime is 77165651. The reversal of 77165641 is 14656177.

It is not a de Polignac number, because 77165641 - 2¹⁵ = 77132873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77165641.

It is not an unprimeable number, because it can be changed into a prime (77165611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35146 + ... + 37276.

It is an arithmetic number, because the mean of its divisors is an integer number (7493980).

Almost surely, 2^77165641 is an apocalyptic number.

It is an amenable number.

77165641 is a deficient number, since it is larger than the sum of its proper divisors (12762119).

77165641 is a wasteful number, since it uses less digits than its factorization.

77165641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884 (or 2877 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 77165641 is about 8784.3975889073. The cubic root of 77165641 is about 425.7369286154.

The spelling of 77165641 in words is "seventy-seven million, one hundred sixty-five thousand, six hundred forty-one".