393774666 has 8 divisors (see below), whose sum is σ = 787549344. Its totient is φ = 131258220.

The previous prime is 393774643. The next prime is 393774671. The reversal of 393774666 is 666477393.

It is a sphenic number, since it is the product of 3 distinct primes.

393774666 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32814550 + ... + 32814561.

It is an arithmetic number, because the mean of its divisors is an integer number (98443668).

Almost surely, 2^393774666 is an apocalyptic number.

393774666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

393774666 is a wasteful number, since it uses less digits than its factorization.

393774666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65629116.

The product of its digits is 3429216, while the sum is 51.

The square root of 393774666 is about 19843.7563480305. The cubic root of 393774666 is about 732.9639090171.

The spelling of 393774666 in words is "three hundred ninety-three million, seven hundred seventy-four thousand, six hundred sixty-six".