666921134 has 8 divisors (see below), whose sum is σ = 1091325528. Its totient is φ = 303145960.

The previous prime is 666921119. The next prime is 666921139. The reversal of 666921134 is 431129666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666921139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15157277 + ... + 15157320.

It is an arithmetic number, because the mean of its divisors is an integer number (136415691).

Almost surely, 2^666921134 is an apocalyptic number.

666921134 is a deficient number, since it is larger than the sum of its proper divisors (424404394).

666921134 is a wasteful number, since it uses less digits than its factorization.

666921134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30314610.

The product of its digits is 46656, while the sum is 38.

The square root of 666921134 is about 25824.8162432959. The cubic root of 666921134 is about 873.6915994431.

The spelling of 666921134 in words is "six hundred sixty-six million, nine hundred twenty-one thousand, one hundred thirty-four".