64316661 has 24 divisors (see below), whose sum is σ = 94074624. Its totient is φ = 39037440.

The previous prime is 64316657. The next prime is 64316663. The reversal of 64316661 is 16661346.

It is not a de Polignac number, because 64316661 - 2² = 64316657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64316663) 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, 25681 + ... + 28073.

It is an arithmetic number, because the mean of its divisors is an integer number (3919776).

Almost surely, 2^64316661 is an apocalyptic number.

It is an amenable number.

64316661 is a deficient number, since it is larger than the sum of its proper divisors (29757963).

64316661 is a wasteful number, since it uses less digits than its factorization.

64316661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461 (or 2444 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 64316661 is about 8019.7668918741. The cubic root of 64316661 is about 400.6586253531.

The spelling of 64316661 in words is "sixty-four million, three hundred sixteen thousand, six hundred sixty-one".