64506766 has 16 divisors (see below), whose sum is σ = 102394368. Its totient is φ = 30415000.

The previous prime is 64506763. The next prime is 64506773. The reversal of 64506766 is 66760546.

It is a super-2 number, since 2×64506766² = 8322245719557512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64506763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6610 + ... + 13141.

It is an arithmetic number, because the mean of its divisors is an integer number (6399648).

Almost surely, 2^64506766 is an apocalyptic number.

64506766 is a deficient number, since it is larger than the sum of its proper divisors (37887602).

64506766 is a wasteful number, since it uses less digits than its factorization.

64506766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19847.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 64506766 is about 8031.6104238191. The cubic root of 64506766 is about 401.0529881077.

The spelling of 64506766 in words is "sixty-four million, five hundred six thousand, seven hundred sixty-six".