660879100 has 72 divisors (see below), whose sum is σ = 1647894528. Its totient is φ = 225355200.

The previous prime is 660879091. The next prime is 660879113. The reversal of 660879100 is 1978066.

It is a super-2 number, since 2×660879100² = 873522369633620000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660879100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131229 + ... + 136171.

It is an arithmetic number, because the mean of its divisors is an integer number (22887424).

Almost surely, 2^660879100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660879100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (823947264).

660879100 is an abundant number, since it is smaller than the sum of its proper divisors (987015428).

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

660879100 is a wasteful number, since it uses less digits than its factorization.

660879100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155 (or 5148 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 660879100 is about 25707.5689243460. The cubic root of 660879100 is about 871.0451613128.

The spelling of 660879100 in words is "six hundred sixty million, eight hundred seventy-nine thousand, one hundred".