64606620 has 96 divisors (see below), whose sum is σ = 196805952. Its totient is φ = 15740928.

The previous prime is 64606603. The next prime is 64606621. The reversal of 64606620 is 2660646.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64606621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87774 + ... + 88506.

It is an arithmetic number, because the mean of its divisors is an integer number (2050062).

Almost surely, 2^64606620 is an apocalyptic number.

64606620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64606620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98402976).

64606620 is an abundant number, since it is smaller than the sum of its proper divisors (132199332).

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

64606620 is a wasteful number, since it uses less digits than its factorization.

64606620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 64606620 is about 8037.8243324920. The cubic root of 64606620 is about 401.2598196372.

The spelling of 64606620 in words is "sixty-four million, six hundred six thousand, six hundred twenty".