64546660 has 24 divisors (see below), whose sum is σ = 135709560. Its totient is φ = 25787904.

The previous prime is 64546631. The next prime is 64546697. The reversal of 64546660 is 6664546.

It can be written as a sum of positive squares in 4 ways, for example, as 12013156 + 52533504 = 3466^2 + 7248^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23436 + ... + 26044.

It is an arithmetic number, because the mean of its divisors is an integer number (5654565).

Almost surely, 2^64546660 is an apocalyptic number.

It is an amenable number.

64546660 is an abundant number, since it is smaller than the sum of its proper divisors (71162900).

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

64546660 is a wasteful number, since it uses less digits than its factorization.

64546660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855 (or 3853 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 64546660 is about 8034.0936016454. The cubic root of 64546660 is about 401.1356477094.

The spelling of 64546660 in words is "sixty-four million, five hundred forty-six thousand, six hundred sixty".