64622646 has 48 divisors (see below), whose sum is σ = 156890448. Its totient is φ = 19051200.

The previous prime is 64622599. The next prime is 64622647.

64622646 is a `hidden beast` number, since 6 + 4 + 6 + 2 + 2 + 646 = 666.

64622646 is nontrivially palindromic in base 10.

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 self number, because there is not a number n which added to its sum of digits gives 64622646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64622647) 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, 2916 + ... + 11736.

It is an arithmetic number, because the mean of its divisors is an integer number (3268551).

Almost surely, 2^64622646 is an apocalyptic number.

64622646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 64622646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78445224).

64622646 is an abundant number, since it is smaller than the sum of its proper divisors (92267802).

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

64622646 is a wasteful number, since it uses less digits than its factorization.

64622646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8877 (or 8874 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 64622646 is about 8038.8211822381. The cubic root of 64622646 is about 401.2929950725.

The spelling of 64622646 in words is "sixty-four million, six hundred twenty-two thousand, six hundred forty-six".