665357144475 has 24 divisors (see below), whose sum is σ = 1104990164992. Its totient is φ = 353265847200.

The previous prime is 665357144471. The next prime is 665357144509. The reversal of 665357144475 is 574441753566.

It is not a de Polignac number, because 665357144475 - 2² = 665357144471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665357144471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19874371 + ... + 19907820.

Almost surely, 2^665357144475 is an apocalyptic number.

665357144475 is a deficient number, since it is larger than the sum of its proper divisors (439633020517).

665357144475 is a wasteful number, since it uses less digits than its factorization.

665357144475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39782427 (or 39782422 counting only the distinct ones).

The product of its digits is 42336000, while the sum is 57.

The spelling of 665357144475 in words is "six hundred sixty-five billion, three hundred fifty-seven million, one hundred forty-four thousand, four hundred seventy-five".