64666413 has 48 divisors (see below), whose sum is σ = 110388096. Its totient is φ = 35717760.

The previous prime is 64666391. The next prime is 64666451. The reversal of 64666413 is 31466646.

It is not a de Polignac number, because 64666413 - 2⁸ = 64666157 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64666013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 357183 + ... + 357363.

It is an arithmetic number, because the mean of its divisors is an integer number (2299752).

Almost surely, 2^64666413 is an apocalyptic number.

64666413 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

64666413 is a deficient number, since it is larger than the sum of its proper divisors (45721683).

64666413 is a wasteful number, since it uses less digits than its factorization.

64666413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 351 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 64666413 is about 8041.5429489620. The cubic root of 64666413 is about 401.3835692393.

The spelling of 64666413 in words is "sixty-four million, six hundred sixty-six thousand, four hundred thirteen".