399560066 has 8 divisors (see below), whose sum is σ = 612092160. Its totient is φ = 195529348.

The previous prime is 399560053. The next prime is 399560069. The reversal of 399560066 is 660065993.

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 = 399559999 and 399560026.

It is not an unprimeable number, because it can be changed into a prime (399560069) 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, 2125226 + ... + 2125413.

It is an arithmetic number, because the mean of its divisors is an integer number (76511520).

Almost surely, 2^399560066 is an apocalyptic number.

399560066 is a deficient number, since it is larger than the sum of its proper divisors (212532094).

399560066 is a wasteful number, since it uses less digits than its factorization.

399560066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250688.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 399560066 is about 19988.9986242433. The cubic root of 399560066 is about 736.5360788522.

The spelling of 399560066 in words is "three hundred ninety-nine million, five hundred sixty thousand, sixty-six".