666392745 has 16 divisors (see below), whose sum is σ = 1066548672. Its totient is φ = 355302720.

The previous prime is 666392689. The next prime is 666392759. The reversal of 666392745 is 547293666.

666392745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666392745 - 2¹³ = 666384553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666392694 and 666392703.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92110 + ... + 99080.

It is an arithmetic number, because the mean of its divisors is an integer number (66659292).

Almost surely, 2^666392745 is an apocalyptic number.

It is an amenable number.

666392745 is a deficient number, since it is larger than the sum of its proper divisors (400155927).

666392745 is a wasteful number, since it uses less digits than its factorization.

666392745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13352.

The product of its digits is 1632960, while the sum is 48.

The square root of 666392745 is about 25814.5839594598. The cubic root of 666392745 is about 873.4608020373.

The spelling of 666392745 in words is "six hundred sixty-six million, three hundred ninety-two thousand, seven hundred forty-five".