63667572 has 48 divisors (see below), whose sum is σ = 151550784. Its totient is φ = 20800000.

The previous prime is 63667561. The next prime is 63667579. The reversal of 63667572 is 27576636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63667579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158572 + ... + 158972.

It is an arithmetic number, because the mean of its divisors is an integer number (3157308).

Almost surely, 2^63667572 is an apocalyptic number.

It is an amenable number.

63667572 is an abundant number, since it is smaller than the sum of its proper divisors (87883212).

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

63667572 is a wasteful number, since it uses less digits than its factorization.

63667572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 638 counting only the distinct ones).

The product of its digits is 317520, while the sum is 42.

The square root of 63667572 is about 7979.1962001194. The cubic root of 63667572 is about 399.3062391019.

The spelling of 63667572 in words is "sixty-three million, six hundred sixty-seven thousand, five hundred seventy-two".