63866988 has 36 divisors (see below), whose sum is σ = 165796680. Its totient is φ = 21261312.

The previous prime is 63866987. The next prime is 63866993. The reversal of 63866988 is 88966836.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

63866988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (63866983) 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 11 ways as a sum of consecutive naturals, for example, 82668 + ... + 83436.

Almost surely, 2^63866988 is an apocalyptic number.

It is an amenable number.

63866988 is an abundant number, since it is smaller than the sum of its proper divisors (101929692).

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

63866988 is an equidigital number, since it uses as much as digits as its factorization.

63866988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551 (or 774 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 63866988 is about 7991.6824261228. The cubic root of 63866988 is about 399.7226994721.

The spelling of 63866988 in words is "sixty-three million, eight hundred sixty-six thousand, nine hundred eighty-eight".