396666808 has 8 divisors (see below), whose sum is σ = 743750280. Its totient is φ = 198333400.

The previous prime is 396666799. The next prime is 396666811. The reversal of 396666808 is 808666693.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×396666808³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24791668 + ... + 24791683.

It is an arithmetic number, because the mean of its divisors is an integer number (92968785).

Almost surely, 2^396666808 is an apocalyptic number.

It is an amenable number.

396666808 is a deficient number, since it is larger than the sum of its proper divisors (347083472).

396666808 is a wasteful number, since it uses less digits than its factorization.

396666808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49583357 (or 49583353 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 52.

The square root of 396666808 is about 19916.4958765341. The cubic root of 396666808 is about 734.7539911256.

The spelling of 396666808 in words is "three hundred ninety-six million, six hundred sixty-six thousand, eight hundred eight".