385225666 has 32 divisors (see below), whose sum is σ = 690363648. Its totient is φ = 157629120.

The previous prime is 385225601. The next prime is 385225669. The reversal of 385225666 is 666522583.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (385225669) 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, 325596 + ... + 326776.

It is an arithmetic number, because the mean of its divisors is an integer number (21573864).

Almost surely, 2^385225666 is an apocalyptic number.

385225666 is a deficient number, since it is larger than the sum of its proper divisors (305137982).

385225666 is a wasteful number, since it uses less digits than its factorization.

385225666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226.

The product of its digits is 518400, while the sum is 43.

The square root of 385225666 is about 19627.1665300929. The cubic root of 385225666 is about 727.6207432157.

The spelling of 385225666 in words is "three hundred eighty-five million, two hundred twenty-five thousand, six hundred sixty-six".