665614633 has 4 divisors (see below), whose sum is σ = 667040400. Its totient is φ = 664188868.

The previous prime is 665614619. The next prime is 665614639. The reversal of 665614633 is 336416566.

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 665614633 - 2²⁵ = 632060201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665614639) 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, 712183 + ... + 713116.

It is an arithmetic number, because the mean of its divisors is an integer number (166760100).

Almost surely, 2^665614633 is an apocalyptic number.

It is an amenable number.

665614633 is a deficient number, since it is larger than the sum of its proper divisors (1425767).

665614633 is a wasteful number, since it uses less digits than its factorization.

665614633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425766.

The product of its digits is 233280, while the sum is 40.

The square root of 665614633 is about 25799.5083867891. The cubic root of 665614633 is about 873.1207047802.

The spelling of 665614633 in words is "six hundred sixty-five million, six hundred fourteen thousand, six hundred thirty-three".