665608075 has 24 divisors (see below), whose sum is σ = 904067136. Its totient is φ = 482100000.

The previous prime is 665608043. The next prime is 665608091. The reversal of 665608075 is 570806566.

It is not a de Polignac number, because 665608075 - 2⁵ = 665608043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64204 + ... + 73846.

It is an arithmetic number, because the mean of its divisors is an integer number (37669464).

Almost surely, 2^665608075 is an apocalyptic number.

665608075 is a deficient number, since it is larger than the sum of its proper divisors (238459061).

665608075 is a wasteful number, since it uses less digits than its factorization.

665608075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9915 (or 9910 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 665608075 is about 25799.3812910310. The cubic root of 665608075 is about 873.1178372830.

The spelling of 665608075 in words is "six hundred sixty-five million, six hundred eight thousand, seventy-five".