64669280 has 48 divisors (see below), whose sum is σ = 164538864. Its totient is φ = 23877120.

The previous prime is 64669277. The next prime is 64669301. The reversal of 64669280 is 8296646.

64669280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 13466 + ... + 17625.

It is an arithmetic number, because the mean of its divisors is an integer number (3427893).

Almost surely, 2^64669280 is an apocalyptic number.

It is an amenable number.

64669280 is an abundant number, since it is smaller than the sum of its proper divisors (99869584).

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

64669280 is a wasteful number, since it uses less digits than its factorization.

64669280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31119 (or 31111 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 64669280 is about 8041.7212087960. The cubic root of 64669280 is about 401.3895009620.

The spelling of 64669280 in words is "sixty-four million, six hundred sixty-nine thousand, two hundred eighty".