666707862 has 32 divisors (see below), whose sum is σ = 1366599168. Its totient is φ = 216722016.

The previous prime is 666707843. The next prime is 666707903. The reversal of 666707862 is 268707666.

It is a happy number.

It is a super-2 number, since 2×666707862² = 888998746505222088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197763 + ... + 201105.

It is an arithmetic number, because the mean of its divisors is an integer number (42706224).

Almost surely, 2^666707862 is an apocalyptic number.

666707862 is an abundant number, since it is smaller than the sum of its proper divisors (699891306).

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

666707862 is a wasteful number, since it uses less digits than its factorization.

666707862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164.

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 666707862 is about 25820.6867065924. The cubic root of 666707862 is about 873.5984580849.

The spelling of 666707862 in words is "six hundred sixty-six million, seven hundred seven thousand, eight hundred sixty-two".