666392746 has 4 divisors (see below), whose sum is σ = 999589122. Its totient is φ = 333196372.

The previous prime is 666392689. The next prime is 666392759. The reversal of 666392746 is 647293666.

666392746 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 652036225 + 14356521 = 25535^2 + 3789^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 666392746.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166598185 + ... + 166598188.

Almost surely, 2^666392746 is an apocalyptic number.

666392746 is a deficient number, since it is larger than the sum of its proper divisors (333196376).

666392746 is a wasteful number, since it uses less digits than its factorization.

666392746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333196375.

The product of its digits is 1959552, while the sum is 49.

The square root of 666392746 is about 25814.5839788287. The cubic root of 666392746 is about 873.4608024742.

The spelling of 666392746 in words is "six hundred sixty-six million, three hundred ninety-two thousand, seven hundred forty-six".