64506620 has 24 divisors (see below), whose sum is σ = 135842784. Its totient is φ = 25730496.

The previous prime is 64506613. The next prime is 64506623. The reversal of 64506620 is 2660546.

It is a super-2 number, since 2×64506620² = 8322208047648800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64506623) 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, 3137 + ... + 11783.

It is an arithmetic number, because the mean of its divisors is an integer number (5660116).

Almost surely, 2^64506620 is an apocalyptic number.

It is an amenable number.

64506620 is an abundant number, since it is smaller than the sum of its proper divisors (71336164).

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

64506620 is a wasteful number, since it uses less digits than its factorization.

64506620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9029 (or 9027 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 64506620 is about 8031.6013347277. The cubic root of 64506620 is about 401.0526855360.

The spelling of 64506620 in words is "sixty-four million, five hundred six thousand, six hundred twenty".