666704700 has 108 divisors (see below), whose sum is σ = 2116427040. Its totient is φ = 175518720.

The previous prime is 666704681. The next prime is 666704747. The reversal of 666704700 is 7407666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66412 + ... + 75788.

Almost surely, 2^666704700 is an apocalyptic number.

666704700 is a gapful number since it is divisible by the number (60) 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 666704700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1058213520).

666704700 is an abundant number, since it is smaller than the sum of its proper divisors (1449722340).

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

666704700 is a wasteful number, since it uses less digits than its factorization.

666704700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9476 (or 9466 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 666704700 is about 25820.6254765449. The cubic root of 666704700 is about 873.5970770089.

The spelling of 666704700 in words is "six hundred sixty-six million, seven hundred four thousand, seven hundred".