63660554034561 has 24 divisors (see below), whose sum is σ = 100531200369600. Its totient is φ = 38498461624800.

The previous prime is 63660554034559. The next prime is 63660554034589. The reversal of 63660554034561 is 16543045506636.

63660554034561 is a `hidden beast` number, since 6 + 3 + 6 + 6 + 0 + 5 + 5 + 40 + 34 + 561 = 666.

It is not a de Polignac number, because 63660554034561 - 2¹ = 63660554034559 is a prime.

It is a super-2 number, since 2×63660554034561² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63660554034498 and 63660554034507.

It is not an unprimeable number, because it can be changed into a prime (63660554030561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 697390261 + ... + 697481538.

It is an arithmetic number, because the mean of its divisors is an integer number (4188800015400).

Almost surely, 2^{63660554034561} is an apocalyptic number.

It is an amenable number.

63660554034561 is a deficient number, since it is larger than the sum of its proper divisors (36870646335039).

63660554034561 is a wasteful number, since it uses less digits than its factorization.

63660554034561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394872277 (or 1394872274 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 54.

The spelling of 63660554034561 in words is "sixty-three trillion, six hundred sixty billion, five hundred fifty-four million, thirty-four thousand, five hundred sixty-one".