666357104 has 80 divisors (see below), whose sum is σ = 1551567360. Its totient is φ = 271054080.

The previous prime is 666357103. The next prime is 666357119. The reversal of 666357104 is 401753666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666357103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357134 + ... + 358994.

It is an arithmetic number, because the mean of its divisors is an integer number (19394592).

Almost surely, 2^666357104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666357104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775783680).

666357104 is an abundant number, since it is smaller than the sum of its proper divisors (885210256).

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

666357104 is a wasteful number, since it uses less digits than its factorization.

666357104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038 (or 2032 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 666357104 is about 25813.8936233959. The cubic root of 666357104 is about 873.4452298532.

The spelling of 666357104 in words is "six hundred sixty-six million, three hundred fifty-seven thousand, one hundred four".