662666406 has 32 divisors (see below), whose sum is σ = 1366312320. Its totient is φ = 214161984.

The previous prime is 662666393. The next prime is 662666419. The reversal of 662666406 is 604666266.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (662666393) and next prime (662666419).

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, 13021 + ... + 38663.

It is an arithmetic number, because the mean of its divisors is an integer number (42697260).

Almost surely, 2^662666406 is an apocalyptic number.

662666406 is an abundant number, since it is smaller than the sum of its proper divisors (703645914).

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

662666406 is a wasteful number, since it uses less digits than its factorization.

662666406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25780.

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 662666406 is about 25742.3077054098. The cubic root of 662666406 is about 871.8296834760.

The spelling of 662666406 in words is "six hundred sixty-two million, six hundred sixty-six thousand, four hundred six".