665000133 has 32 divisors (see below), whose sum is σ = 1089392640. Its totient is φ = 352330560.

The previous prime is 665000107. The next prime is 665000137. The reversal of 665000133 is 331000566.

It is not a de Polignac number, because 665000133 - 2⁸ = 664999877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665000137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1023 + ... + 36483.

It is an arithmetic number, because the mean of its divisors is an integer number (34043520).

Almost surely, 2^665000133 is an apocalyptic number.

It is an amenable number.

665000133 is a deficient number, since it is larger than the sum of its proper divisors (424392507).

665000133 is a wasteful number, since it uses less digits than its factorization.

665000133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35537.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 665000133 is about 25787.5964952145. The cubic root of 665000133 is about 872.8519317087.

Adding to 665000133 its reverse (331000566), we get a palindrome (996000699).

The spelling of 665000133 in words is "six hundred sixty-five million, one hundred thirty-three", and thus it is an aban number.