660222660 has 24 divisors (see below), whose sum is σ = 1848623616. Its totient is φ = 176059360.

The previous prime is 660222637. The next prime is 660222691. The reversal of 660222660 is 66222066.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5501796 + ... + 5501915.

It is an arithmetic number, because the mean of its divisors is an integer number (77025984).

Almost surely, 2^660222660 is an apocalyptic number.

660222660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660222660 is an abundant number, since it is smaller than the sum of its proper divisors (1188400956).

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

660222660 is a wasteful number, since it uses less digits than its factorization.

660222660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11003723 (or 11003721 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 660222660 is about 25694.7983062720. The cubic root of 660222660 is about 870.7566676452.

The spelling of 660222660 in words is "six hundred sixty million, two hundred twenty-two thousand, six hundred sixty".