6661101161560 has 32 divisors (see below), whose sum is σ = 14987552582160. Its totient is φ = 2664427136896.

The previous prime is 6661101161543. The next prime is 6661101161623. The reversal of 6661101161560 is 651611011666.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13077987 + ... + 13577773.

Almost surely, 2^{6661101161560} is an apocalyptic number.

It is an amenable number.

6661101161560 is an abundant number, since it is smaller than the sum of its proper divisors (8326451420600).

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

6661101161560 is a wasteful number, since it uses less digits than its factorization.

6661101161560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832995 (or 832991 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 6661101161560 in words is "six trillion, six hundred sixty-one billion, one hundred one million, one hundred sixty-one thousand, five hundred sixty".