385356666 has 32 divisors (see below), whose sum is σ = 788578560. Its totient is φ = 125485056.

The previous prime is 385356659. The next prime is 385356667. The reversal of 385356666 is 666653583.

It is not an unprimeable number, because it can be changed into a prime (385356667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215970 + ... + 217746.

It is an arithmetic number, because the mean of its divisors is an integer number (24643080).

Almost surely, 2^385356666 is an apocalyptic number.

385356666 is an abundant number, since it is smaller than the sum of its proper divisors (403221894).

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

385356666 is a wasteful number, since it uses less digits than its factorization.

385356666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598.

The product of its digits is 2332800, while the sum is 48.

The square root of 385356666 is about 19630.5034576294. The cubic root of 385356666 is about 727.7032122057.

The spelling of 385356666 in words is "three hundred eighty-five million, three hundred fifty-six thousand, six hundred sixty-six".