64357866 has 12 divisors (see below), whose sum is σ = 139442082. Its totient is φ = 21452616.

The previous prime is 64357859. The next prime is 64357871. The reversal of 64357866 is 66875346.

It can be written as a sum of positive squares in only one way, i.e., 52142841 + 12215025 = 7221^2 + 3495^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1787701 + ... + 1787736.

Almost surely, 2^64357866 is an apocalyptic number.

64357866 is an abundant number, since it is smaller than the sum of its proper divisors (75084216).

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

64357866 is a wasteful number, since it uses less digits than its factorization.

64357866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575445 (or 3575442 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 64357866 is about 8022.3354454922. The cubic root of 64357866 is about 400.7441688399.

The spelling of 64357866 in words is "sixty-four million, three hundred fifty-seven thousand, eight hundred sixty-six".