667472858197 has 4 divisors (see below), whose sum is σ = 667475651680. Its totient is φ = 667470064716.

The previous prime is 667472858179. The next prime is 667472858201. The reversal of 667472858197 is 791858274766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667472858197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667472858147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000947 + ... + 1528672.

It is an arithmetic number, because the mean of its divisors is an integer number (166868912920).

Almost surely, 2^667472858197 is an apocalyptic number.

It is an amenable number.

667472858197 is a deficient number, since it is larger than the sum of its proper divisors (2793483).

667472858197 is a wasteful number, since it uses less digits than its factorization.

667472858197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793482.

The product of its digits is 284497920, while the sum is 70.

The spelling of 667472858197 in words is "six hundred sixty-seven billion, four hundred seventy-two million, eight hundred fifty-eight thousand, one hundred ninety-seven".