666211527367190 has 64 divisors (see below), whose sum is σ = 1407583974518784. Its totient is φ = 222233883043968.

The previous prime is 666211527367189. The next prime is 666211527367201. The reversal of 666211527367190 is 91763725112666.

It is a happy number.

It is a super-2 number, since 2×666211527367190² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66512309 + ... + 75870351.

It is an arithmetic number, because the mean of its divisors is an integer number (21993499601856).

Almost surely, 2^{666211527367190} is an apocalyptic number.

666211527367190 is an abundant number, since it is smaller than the sum of its proper divisors (741372447151594).

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

666211527367190 is a wasteful number, since it uses less digits than its factorization.

666211527367190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9385581.

The product of its (nonzero) digits is 34292160, while the sum is 62.

The spelling of 666211527367190 in words is "six hundred sixty-six trillion, two hundred eleven billion, five hundred twenty-seven million, three hundred sixty-seven thousand, one hundred ninety".