64663554 has 16 divisors (see below), whose sum is σ = 130965120. Its totient is φ = 21281520.

The previous prime is 64663553. The next prime is 64663559. The reversal of 64663554 is 45536646.

It is not an unprimeable number, because it can be changed into a prime (64663553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67737 + ... + 68684.

It is an arithmetic number, because the mean of its divisors is an integer number (8185320).

Almost surely, 2^64663554 is an apocalyptic number.

64663554 is an abundant number, since it is smaller than the sum of its proper divisors (66301566).

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

64663554 is a wasteful number, since it uses less digits than its factorization.

64663554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136505.

The product of its digits is 259200, while the sum is 39.

The square root of 64663554 is about 8041.3651826043. The cubic root of 64663554 is about 401.3776538938.

The spelling of 64663554 in words is "sixty-four million, six hundred sixty-three thousand, five hundred fifty-four".