63990675 has 96 divisors (see below), whose sum is σ = 139276800. Its totient is φ = 28183680.

The previous prime is 63990643. The next prime is 63990677. The reversal of 63990675 is 57609936.

63990675 is a `hidden beast` number, since 639 + 9 + 0 + 6 + 7 + 5 = 666.

It is not a de Polignac number, because 63990675 - 2⁵ = 63990643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 63990675.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63990677) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 136792 + ... + 137258.

It is an arithmetic number, because the mean of its divisors is an integer number (1450800).

Almost surely, 2^63990675 is an apocalyptic number.

63990675 is an abundant number, since it is smaller than the sum of its proper divisors (75286125).

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

63990675 is a wasteful number, since it uses less digits than its factorization.

63990675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 63990675 is about 7999.4171662691. The cubic root of 63990675 is about 399.9805719731.

The spelling of 63990675 in words is "sixty-three million, nine hundred ninety thousand, six hundred seventy-five".