665745675383 has 4 divisors (see below), whose sum is σ = 688702422840. Its totient is φ = 642788927928.

The previous prime is 665745675319. The next prime is 665745675403. The reversal of 665745675383 is 383576547566.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 665745675383 - 2⁶ = 665745675319 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 (665745678383) 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, 11478373685 + ... + 11478373742.

It is an arithmetic number, because the mean of its divisors is an integer number (172175605710).

Almost surely, 2^665745675383 is an apocalyptic number.

665745675383 is a deficient number, since it is larger than the sum of its proper divisors (22956747457).

665745675383 is a wasteful number, since it uses less digits than its factorization.

665745675383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22956747456.

The product of its digits is 381024000, while the sum is 65.

The spelling of 665745675383 in words is "six hundred sixty-five billion, seven hundred forty-five million, six hundred seventy-five thousand, three hundred eighty-three".