64266138 has 12 divisors (see below), whose sum is σ = 139243338. Its totient is φ = 21422040.

The previous prime is 64266107. The next prime is 64266143. The reversal of 64266138 is 83166246.

64266138 is a `hidden beast` number, since 642 + 6 + 6 + 1 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41254929 + 23011209 = 6423^2 + 4797^2 .

It is a super-5 number, since 5×64266138⁵ (a number of 40 digits) contains 55555 as substring.

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, 1785153 + ... + 1785188.

Almost surely, 2^64266138 is an apocalyptic number.

64266138 is an abundant number, since it is smaller than the sum of its proper divisors (74977200).

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

64266138 is a wasteful number, since it uses less digits than its factorization.

64266138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570349 (or 3570346 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 64266138 is about 8016.6163685186. The cubic root of 64266138 is about 400.5536873887.

The spelling of 64266138 in words is "sixty-four million, two hundred sixty-six thousand, one hundred thirty-eight".