385666601 has 4 divisors (see below), whose sum is σ = 386923152. Its totient is φ = 384410052.

The previous prime is 385666597. The next prime is 385666609. The reversal of 385666601 is 106666583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 385666601 - 2² = 385666597 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (385666609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627815 + ... + 628428.

It is an arithmetic number, because the mean of its divisors is an integer number (96730788).

Almost surely, 2^385666601 is an apocalyptic number.

It is an amenable number.

385666601 is a deficient number, since it is larger than the sum of its proper divisors (1256551).

385666601 is a wasteful number, since it uses less digits than its factorization.

385666601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256550.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 385666601 is about 19638.3960903125. The cubic root of 385666601 is about 727.8982525203.

The spelling of 385666601 in words is "three hundred eighty-five million, six hundred sixty-six thousand, six hundred one".