666177396 has 24 divisors (see below), whose sum is σ = 1558525920. Its totient is φ = 221471712.

The previous prime is 666177311. The next prime is 666177397. The reversal of 666177396 is 693771666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666177397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68691 + ... + 77786.

It is an arithmetic number, because the mean of its divisors is an integer number (64938580).

Almost surely, 2^666177396 is an apocalyptic number.

It is an amenable number.

666177396 is an abundant number, since it is smaller than the sum of its proper divisors (892348524).

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

666177396 is a wasteful number, since it uses less digits than its factorization.

666177396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146863 (or 146861 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 51.

The square root of 666177396 is about 25810.4125499768. The cubic root of 666177396 is about 873.3667037861.

The spelling of 666177396 in words is "six hundred sixty-six million, one hundred seventy-seven thousand, three hundred ninety-six".