661160101 has 16 divisors (see below), whose sum is σ = 766022400. Its totient is φ = 558949248.

The previous prime is 661160099. The next prime is 661160147. The reversal of 661160101 is 101061166.

It is a cyclic number.

It is not a de Polignac number, because 661160101 - 2¹ = 661160099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661166101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175920 + ... + 179638.

It is an arithmetic number, because the mean of its divisors is an integer number (47876400).

Almost surely, 2^661160101 is an apocalyptic number.

It is an amenable number.

661160101 is a deficient number, since it is larger than the sum of its proper divisors (104862299).

661160101 is a wasteful number, since it uses less digits than its factorization.

661160101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 661160101 is about 25713.0336794397. The cubic root of 661160101 is about 871.1685978480.

The spelling of 661160101 in words is "six hundred sixty-one million, one hundred sixty thousand, one hundred one".