661101106160 has 40 divisors (see below), whose sum is σ = 1676792807856. Its totient is φ = 240400401920.

The previous prime is 661101106139. The next prime is 661101106217. The reversal of 661101106160 is 61601101166.

It is a tau number, because it is divible by the number of its divisors (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, 375624749 + ... + 375626508.

Almost surely, 2^661101106160 is an apocalyptic number.

It is an amenable number.

661101106160 is an abundant number, since it is smaller than the sum of its proper divisors (1015691701696).

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

661101106160 is a wasteful number, since it uses less digits than its factorization.

661101106160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751251281 (or 751251275 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 661101106160 in words is "six hundred sixty-one billion, one hundred one million, one hundred six thousand, one hundred sixty".