660121068 has 48 divisors (see below), whose sum is σ = 1659119616. Its totient is φ = 203681280.

The previous prime is 660121043. The next prime is 660121073. The reversal of 660121068 is 860121066.

It is a super-4 number, since 4×660121068⁴ (a number of 36 digits) contains 4444 as substring.

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, 30021 + ... + 47132.

It is an arithmetic number, because the mean of its divisors is an integer number (34564992).

Almost surely, 2^660121068 is an apocalyptic number.

It is an amenable number.

660121068 is an abundant number, since it is smaller than the sum of its proper divisors (998998548).

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

660121068 is a wasteful number, since it uses less digits than its factorization.

660121068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77214 (or 77212 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 660121068 is about 25692.8213320375. The cubic root of 660121068 is about 870.7120026887.

The spelling of 660121068 in words is "six hundred sixty million, one hundred twenty-one thousand, sixty-eight".