65644074 has 16 divisors (see below), whose sum is σ = 145875840. Its totient is φ = 21881340.

The previous prime is 65644057. The next prime is 65644097. The reversal of 65644074 is 47044656.

65644074 is a `hidden beast` number, since 6 + 5 + 644 + 0 + 7 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607762 + ... + 607869.

It is an arithmetic number, because the mean of its divisors is an integer number (9117240).

Almost surely, 2^65644074 is an apocalyptic number.

65644074 is an abundant number, since it is smaller than the sum of its proper divisors (80231766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65644074 is a wasteful number, since it uses less digits than its factorization.

65644074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215642 (or 1215636 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 65644074 is about 8102.1030603171. The cubic root of 65644074 is about 403.3962364991.

The spelling of 65644074 in words is "sixty-five million, six hundred forty-four thousand, seventy-four".