666166612 has 12 divisors (see below), whose sum is σ = 1170671040. Its totient is φ = 331689176.

The previous prime is 666166597. The next prime is 666166637. The reversal of 666166612 is 216661666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347458 + ... + 349369.

It is an arithmetic number, because the mean of its divisors is an integer number (97555920).

Almost surely, 2^666166612 is an apocalyptic number.

It is an amenable number.

666166612 is a deficient number, since it is larger than the sum of its proper divisors (504504428).

666166612 is a wasteful number, since it uses less digits than its factorization.

666166612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697070 (or 697068 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 666166612 is about 25810.2036411959. The cubic root of 666166612 is about 873.3619911088.

The spelling of 666166612 in words is "six hundred sixty-six million, one hundred sixty-six thousand, six hundred twelve".