660121125 has 32 divisors (see below), whose sum is σ = 1103381760. Its totient is φ = 350481600.

The previous prime is 660121103. The next prime is 660121127. The reversal of 660121125 is 521121066.

It is not a de Polignac number, because 660121125 - 2⁵ = 660121093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660121095 and 660121104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660121127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82032 + ... + 89718.

It is an arithmetic number, because the mean of its divisors is an integer number (34480680).

Almost surely, 2^660121125 is an apocalyptic number.

It is an amenable number.

660121125 is a deficient number, since it is larger than the sum of its proper divisors (443260635).

660121125 is a wasteful number, since it uses less digits than its factorization.

660121125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7934 (or 7924 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 660121125 is about 25692.8224412967. The cubic root of 660121125 is about 870.7120277500.

The spelling of 660121125 in words is "six hundred sixty million, one hundred twenty-one thousand, one hundred twenty-five".