972812666 has 8 divisors (see below), whose sum is σ = 1667678880. Its totient is φ = 416919708.

The previous prime is 972812653. The next prime is 972812671. The reversal of 972812666 is 666218279.

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

It is a self number, because there is not a number n which added to its sum of digits gives 972812666.

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, 34743296 + ... + 34743323.

It is an arithmetic number, because the mean of its divisors is an integer number (208459860).

Almost surely, 2^972812666 is an apocalyptic number.

972812666 is a deficient number, since it is larger than the sum of its proper divisors (694866214).

972812666 is a wasteful number, since it uses less digits than its factorization.

972812666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69486628.

The product of its digits is 435456, while the sum is 47.

The square root of 972812666 is about 31189.9449502560. The cubic root of 972812666 is about 990.8541640228.

The spelling of 972812666 in words is "nine hundred seventy-two million, eight hundred twelve thousand, six hundred sixty-six".