666654456597 has 8 divisors (see below), whose sum is σ = 935655377760. Its totient is φ = 421044919920.

The previous prime is 666654456583. The next prime is 666654456607. The reversal of 666654456597 is 795654456666.

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

It is not a de Polignac number, because 666654456597 - 2¹⁴ = 666654440213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666654456547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5847846054 + ... + 5847846167.

It is an arithmetic number, because the mean of its divisors is an integer number (116956922220).

Almost surely, 2^666654456597 is an apocalyptic number.

It is an amenable number.

666654456597 is a deficient number, since it is larger than the sum of its proper divisors (269000921163).

666654456597 is a wasteful number, since it uses less digits than its factorization.

666654456597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11695692243.

The product of its digits is 979776000, while the sum is 69.

Adding to 666654456597 its sum of digits (69), we get a palindrome (666654456666).

The spelling of 666654456597 in words is "six hundred sixty-six billion, six hundred fifty-four million, four hundred fifty-six thousand, five hundred ninety-seven".