63566540 has 12 divisors (see below), whose sum is σ = 133489776. Its totient is φ = 25426608.

The previous prime is 63566539. The next prime is 63566543. The reversal of 63566540 is 4566536.

It is a self number, because there is not a number n which added to its sum of digits gives 63566540.

It is not an unprimeable number, because it can be changed into a prime (63566543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589144 + ... + 1589183.

It is an arithmetic number, because the mean of its divisors is an integer number (11124148).

Almost surely, 2^63566540 is an apocalyptic number.

It is an amenable number.

63566540 is an abundant number, since it is smaller than the sum of its proper divisors (69923236).

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

63566540 is a wasteful number, since it uses less digits than its factorization.

63566540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178336 (or 3178334 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 63566540 is about 7972.8627230124. The cubic root of 63566540 is about 399.0949119169.

The spelling of 63566540 in words is "sixty-three million, five hundred sixty-six thousand, five hundred forty".