661541053170 has 32 divisors (see below), whose sum is σ = 1588257191232. Its totient is φ = 176348873792.

The previous prime is 661541053169. The next prime is 661541053181. The reversal of 661541053170 is 71350145166.

661541053170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3792897 + ... + 3963476.

It is an arithmetic number, because the mean of its divisors is an integer number (49633037226).

Almost surely, 2^661541053170 is an apocalyptic number.

661541053170 is an abundant number, since it is smaller than the sum of its proper divisors (926716138062).

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

661541053170 is a wasteful number, since it uses less digits than its factorization.

661541053170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7759226.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 661541053170 in words is "six hundred sixty-one billion, five hundred forty-one million, fifty-three thousand, one hundred seventy".