399548066 has 8 divisors (see below), whose sum is σ = 599420460. Its totient is φ = 199741248.

The previous prime is 399548041. The next prime is 399548069. The reversal of 399548066 is 660845993.

It can be written as a sum of positive squares in 2 ways, for example, as 397803025 + 1745041 = 19945^2 + 1321^2 .

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

It is not an unprimeable number, because it can be changed into a prime (399548069) 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, 3830 + ... + 28526.

Almost surely, 2^399548066 is an apocalyptic number.

399548066 is a deficient number, since it is larger than the sum of its proper divisors (199872394).

399548066 is a wasteful number, since it uses less digits than its factorization.

399548066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32788.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 399548066 is about 19988.6984568781. The cubic root of 399548066 is about 736.5287053080.

The spelling of 399548066 in words is "three hundred ninety-nine million, five hundred forty-eight thousand, sixty-six".