666672794 has 8 divisors (see below), whose sum is σ = 1032267648. Its totient is φ = 322583580.

The previous prime is 666672761. The next prime is 666672823. The reversal of 666672794 is 497276666.

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

It is a super-2 number, since 2×666672794² = 888905228519532872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5376332 + ... + 5376455.

It is an arithmetic number, because the mean of its divisors is an integer number (129033456).

Almost surely, 2^666672794 is an apocalyptic number.

666672794 is a deficient number, since it is larger than the sum of its proper divisors (365594854).

666672794 is a wasteful number, since it uses less digits than its factorization.

666672794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10752820.

The product of its digits is 4572288, while the sum is 53.

The square root of 666672794 is about 25820.0076297433. The cubic root of 666672794 is about 873.5831410874.

The spelling of 666672794 in words is "six hundred sixty-six million, six hundred seventy-two thousand, seven hundred ninety-four".