64660620 has 24 divisors (see below), whose sum is σ = 181049904. Its totient is φ = 17242816.

The previous prime is 64660601. The next prime is 64660627. The reversal of 64660620 is 2606646.

64660620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (64660627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538779 + ... + 538898.

It is an arithmetic number, because the mean of its divisors is an integer number (7543746).

Almost surely, 2^64660620 is an apocalyptic number.

64660620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64660620 is an abundant number, since it is smaller than the sum of its proper divisors (116389284).

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

64660620 is a wasteful number, since it uses less digits than its factorization.

64660620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077689 (or 1077687 counting only the distinct ones).

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

The square root of 64660620 is about 8041.1827488250. The cubic root of 64660620 is about 401.3715831900.

The spelling of 64660620 in words is "sixty-four million, six hundred sixty thousand, six hundred twenty".