662666404 has 12 divisors (see below), whose sum is σ = 1160116300. Its totient is φ = 331204608.

The previous prime is 662666393. The next prime is 662666419. The reversal of 662666404 is 404666266.

It can be written as a sum of positive squares in 2 ways, for example, as 39664804 + 623001600 = 6298^2 + 24960^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20049 + ... + 41560.

Almost surely, 2^662666404 is an apocalyptic number.

It is an amenable number.

662666404 is a deficient number, since it is larger than the sum of its proper divisors (497449896).

662666404 is a wasteful number, since it uses less digits than its factorization.

662666404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64302 (or 64300 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 662666404 is about 25742.3076665632. The cubic root of 662666404 is about 871.8296825990.

The spelling of 662666404 in words is "six hundred sixty-two million, six hundred sixty-six thousand, four hundred four".