399292066 has 16 divisors (see below), whose sum is σ = 618830784. Its totient is φ = 193105584.

The previous prime is 399292063. The next prime is 399292079. The reversal of 399292066 is 660292993.

It is not an unprimeable number, because it can be changed into a prime (399292063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13681 + ... + 31396.

It is an arithmetic number, because the mean of its divisors is an integer number (38676924).

Almost surely, 2^399292066 is an apocalyptic number.

399292066 is a deficient number, since it is larger than the sum of its proper divisors (219538718).

399292066 is a wasteful number, since it uses less digits than its factorization.

399292066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45225.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 399292066 is about 19982.2938122729. The cubic root of 399292066 is about 736.3713678487.

The spelling of 399292066 in words is "three hundred ninety-nine million, two hundred ninety-two thousand, sixty-six".