666347166 has 24 divisors (see below), whose sum is σ = 1449752304. Its totient is φ = 221192640.

The previous prime is 666347159. The next prime is 666347173. The reversal of 666347166 is 661743666.

It is an interprime number because it is at equal distance from previous prime (666347159) and next prime (666347173).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72466 + ... + 81141.

It is an arithmetic number, because the mean of its divisors is an integer number (60406346).

Almost surely, 2^666347166 is an apocalyptic number.

666347166 is an abundant number, since it is smaller than the sum of its proper divisors (783405138).

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

666347166 is a wasteful number, since it uses less digits than its factorization.

666347166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153856 (or 153853 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 666347166 is about 25813.7011294390. The cubic root of 666347166 is about 873.4408876660.

The spelling of 666347166 in words is "six hundred sixty-six million, three hundred forty-seven thousand, one hundred sixty-six".