668666166192 has 60 divisors (see below), whose sum is σ = 1871532096720. Its totient is φ = 222865432704.

The previous prime is 668666166167. The next prime is 668666166247. The reversal of 668666166192 is 291661666866.

It is a super-2 number, since 2×668666166192² (a number of 24 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1168734 + ... + 1644162.

It is an arithmetic number, because the mean of its divisors is an integer number (31192201612).

Almost surely, 2^668666166192 is an apocalyptic number.

It is an amenable number.

668666166192 is an abundant number, since it is smaller than the sum of its proper divisors (1202865930528).

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

668666166192 is a wasteful number, since it uses less digits than its factorization.

668666166192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485210 (or 485201 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 63.

The spelling of 668666166192 in words is "six hundred sixty-eight billion, six hundred sixty-six million, one hundred sixty-six thousand, one hundred ninety-two".