63660660 has 48 divisors (see below), whose sum is σ = 203715456. Its totient is φ = 14550912.

The previous prime is 63660647. The next prime is 63660661. The reversal of 63660660 is 6606636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63660661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75367 + ... + 76206.

It is an arithmetic number, because the mean of its divisors is an integer number (4244072).

Almost surely, 2^63660660 is an apocalyptic number.

63660660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63660660 is an abundant number, since it is smaller than the sum of its proper divisors (140054796).

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

63660660 is a wasteful number, since it uses less digits than its factorization.

63660660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151592 (or 151590 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 63660660 is about 7978.7630620291. The cubic root of 63660660 is about 399.2917884979.

The spelling of 63660660 in words is "sixty-three million, six hundred sixty thousand, six hundred sixty".