666952704 has 440 divisors, whose sum is σ = 2354017248. Its totient is φ = 185794560.

The previous prime is 666952691. The next prime is 666952723. The reversal of 666952704 is 407259666.

It is a self number, because there is not a number n which added to its sum of digits gives 666952704.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15510507 + ... + 15510549.

Almost surely, 2^666952704 is an apocalyptic number.

666952704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666952704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177008624).

666952704 is an abundant number, since it is smaller than the sum of its proper divisors (1687064544).

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

666952704 is a wasteful number, since it uses less digits than its factorization.

666952704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 666952704 is about 25825.4274698406. The cubic root of 666952704 is about 873.7053851853.

The spelling of 666952704 in words is "six hundred sixty-six million, nine hundred fifty-two thousand, seven hundred four".