6665531583 has 16 divisors (see below), whose sum is σ = 9277272576. Its totient is φ = 4248884640.

The previous prime is 6665531533. The next prime is 6665531599. The reversal of 6665531583 is 3851355666.

It is not a de Polignac number, because 6665531583 - 2²² = 6661337279 is a prime.

It is a super-2 number, since 2×6665531583² = 88858622567940971778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665531533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182473 + ... + 215933.

It is an arithmetic number, because the mean of its divisors is an integer number (579829536).

Almost surely, 2^6665531583 is an apocalyptic number.

6665531583 is a deficient number, since it is larger than the sum of its proper divisors (2611740993).

6665531583 is a wasteful number, since it uses less digits than its factorization.

6665531583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36374.

The product of its digits is 1944000, while the sum is 48.

The square root of 6665531583 is about 81642.7068573795. The cubic root of 6665531583 is about 1881.9652362366.

The spelling of 6665531583 in words is "six billion, six hundred sixty-five million, five hundred thirty-one thousand, five hundred eighty-three".