399666058 has 8 divisors (see below), whose sum is σ = 653999040. Its totient is φ = 181666380.

The previous prime is 399666053. The next prime is 399666131. The reversal of 399666058 is 850666993.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 399665996 and 399666014.

It is not an unprimeable number, because it can be changed into a prime (399666053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9083298 + ... + 9083341.

It is an arithmetic number, because the mean of its divisors is an integer number (81749880).

Almost surely, 2^399666058 is an apocalyptic number.

399666058 is a deficient number, since it is larger than the sum of its proper divisors (254332982).

399666058 is a wasteful number, since it uses less digits than its factorization.

399666058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18166652.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The square root of 399666058 is about 19991.6497068151. The cubic root of 399666058 is about 736.6012005003.

The spelling of 399666058 in words is "three hundred ninety-nine million, six hundred sixty-six thousand, fifty-eight".