666735974 has 8 divisors (see below), whose sum is σ = 1001954208. Its totient is φ = 332751240.

The previous prime is 666735947. The next prime is 666735991. The reversal of 666735974 is 479537666.

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

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, 307022 + ... + 309185.

It is an arithmetic number, because the mean of its divisors is an integer number (125244276).

Almost surely, 2^666735974 is an apocalyptic number.

666735974 is a deficient number, since it is larger than the sum of its proper divisors (335218234).

666735974 is a wasteful number, since it uses less digits than its factorization.

666735974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616750.

The product of its digits is 5715360, while the sum is 53.

The square root of 666735974 is about 25821.2310705745. The cubic root of 666735974 is about 873.6107364535.

The spelling of 666735974 in words is "six hundred sixty-six million, seven hundred thirty-five thousand, nine hundred seventy-four".