63131660 has 12 divisors (see below), whose sum is σ = 132576528. Its totient is φ = 25252656.

The previous prime is 63131647. The next prime is 63131671. The reversal of 63131660 is 6613136.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578272 + ... + 1578311.

It is an arithmetic number, because the mean of its divisors is an integer number (11048044).

Almost surely, 2^63131660 is an apocalyptic number.

It is an amenable number.

63131660 is an abundant number, since it is smaller than the sum of its proper divisors (69444868).

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

63131660 is a wasteful number, since it uses less digits than its factorization.

63131660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156592 (or 3156590 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 63131660 is about 7945.5434049535. The cubic root of 63131660 is about 398.1827145205.

Adding to 63131660 its reverse (6613136), we get a palindrome (69744796).

The spelling of 63131660 in words is "sixty-three million, one hundred thirty-one thousand, six hundred sixty".