666772670 has 8 divisors (see below), whose sum is σ = 1200190824. Its totient is φ = 266709064.

The previous prime is 666772651. The next prime is 666772697. The reversal of 666772670 is 76277666.

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

It is a Curzon number.

It is a congruent number.

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, 33338624 + ... + 33338643.

It is an arithmetic number, because the mean of its divisors is an integer number (150023853).

Almost surely, 2^666772670 is an apocalyptic number.

666772670 is a deficient number, since it is larger than the sum of its proper divisors (533418154).

666772670 is a wasteful number, since it uses less digits than its factorization.

666772670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66677274.

The product of its (nonzero) digits is 889056, while the sum is 47.

The square root of 666772670 is about 25821.9416388466. The cubic root of 666772670 is about 873.6267635031.

The spelling of 666772670 in words is "six hundred sixty-six million, seven hundred seventy-two thousand, six hundred seventy".