666701973 has 12 divisors (see below), whose sum is σ = 1100587488. Its totient is φ = 380972520.

The previous prime is 666701941. The next prime is 666701977. The reversal of 666701973 is 379107666.

666701973 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 666701973 - 2⁵ = 666701941 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666701977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5291223 + ... + 5291348.

It is an arithmetic number, because the mean of its divisors is an integer number (91715624).

Almost surely, 2^666701973 is an apocalyptic number.

666701973 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

666701973 is a deficient number, since it is larger than the sum of its proper divisors (433885515).

666701973 is a wasteful number, since it uses less digits than its factorization.

666701973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10582584 (or 10582581 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 666701973 is about 25820.5726698693. The cubic root of 666701973 is about 873.5958859256.

The spelling of 666701973 in words is "six hundred sixty-six million, seven hundred one thousand, nine hundred seventy-three".