63660430666815 has 64 divisors (see below), whose sum is σ = 110159356561920. Its totient is φ = 31275042037760.

The previous prime is 63660430666801. The next prime is 63660430666843. The reversal of 63660430666815 is 51866603406636.

It is not a de Polignac number, because 63660430666815 - 2⁵ = 63660430666783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5904906 + ... + 12735335.

It is an arithmetic number, because the mean of its divisors is an integer number (1721239946280).

Almost surely, 2^{63660430666815} is an apocalyptic number.

63660430666815 is a deficient number, since it is larger than the sum of its proper divisors (46498925895105).

63660430666815 is a wasteful number, since it uses less digits than its factorization.

63660430666815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18640552.

The product of its (nonzero) digits is 67184640, while the sum is 60.

The spelling of 63660430666815 in words is "sixty-three trillion, six hundred sixty billion, four hundred thirty million, six hundred sixty-six thousand, eight hundred fifteen".