665432564741 has 4 divisors (see below), whose sum is σ = 760494359712. Its totient is φ = 570370769772.

The previous prime is 665432564737. The next prime is 665432564747. The reversal of 665432564741 is 147465234566.

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 not a de Polignac number, because 665432564741 - 2² = 665432564737 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 (665432564747) 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, 47530897475 + ... + 47530897488.

It is an arithmetic number, because the mean of its divisors is an integer number (190123589928).

Almost surely, 2^665432564741 is an apocalyptic number.

It is an amenable number.

665432564741 is a deficient number, since it is larger than the sum of its proper divisors (95061794971).

665432564741 is an equidigital number, since it uses as much as digits as its factorization.

665432564741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95061794970.

The product of its digits is 14515200, while the sum is 53.

The spelling of 665432564741 in words is "six hundred sixty-five billion, four hundred thirty-two million, five hundred sixty-four thousand, seven hundred forty-one".