665396235 has 192 divisors, whose sum is σ = 1496154240. Its totient is φ = 278691840.

The previous prime is 665396209. The next prime is 665396239. The reversal of 665396235 is 532693566.

It is not a de Polignac number, because 665396235 - 2⁵ = 665396203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (665396239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6859707 + ... + 6859803.

It is an arithmetic number, because the mean of its divisors is an integer number (7792470).

Almost surely, 2^665396235 is an apocalyptic number.

665396235 is an abundant number, since it is smaller than the sum of its proper divisors (830758005).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665396235 is a wasteful number, since it uses less digits than its factorization.

665396235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 190 counting only the distinct ones).

The product of its digits is 874800, while the sum is 45.

The square root of 665396235 is about 25795.2754395064. The cubic root of 665396235 is about 873.0251997308.

It can be divided in two parts, 665 and 396235, that added together give a square (396900 = 630²).

The spelling of 665396235 in words is "six hundred sixty-five million, three hundred ninety-six thousand, two hundred thirty-five".