665432747555 has 32 divisors (see below), whose sum is σ = 830754247680. Its totient is φ = 511310033920.

The previous prime is 665432747537. The next prime is 665432747569. The reversal of 665432747555 is 555747234566.

It is not a de Polignac number, because 665432747555 - 2²⁴ = 665415970339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a junction number, because it is equal to n+sod(n) for n = 665432747494 and 665432747503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8097875 + ... + 8179635.

It is an arithmetic number, because the mean of its divisors is an integer number (25961070240).

Almost surely, 2^665432747555 is an apocalyptic number.

665432747555 is a deficient number, since it is larger than the sum of its proper divisors (165321500125).

665432747555 is a wasteful number, since it uses less digits than its factorization.

665432747555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82459.

The product of its digits is 105840000, while the sum is 59.

The spelling of 665432747555 in words is "six hundred sixty-five billion, four hundred thirty-two million, seven hundred forty-seven thousand, five hundred fifty-five".