665353413 has 16 divisors (see below), whose sum is σ = 1001870400. Its totient is φ = 436296240.

The previous prime is 665353399. The next prime is 665353421. The reversal of 665353413 is 314353566.

665353413 is a `hidden beast` number, since 66 + 53 + 534 + 13 = 666.

It is not a de Polignac number, because 665353413 - 2⁴ = 665353397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665353433) 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, 200343 + ... + 203636.

It is an arithmetic number, because the mean of its divisors is an integer number (62616900).

Almost surely, 2^665353413 is an apocalyptic number.

It is an amenable number.

665353413 is a deficient number, since it is larger than the sum of its proper divisors (336516987).

665353413 is a wasteful number, since it uses less digits than its factorization.

665353413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404049 (or 404043 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The square root of 665353413 is about 25794.4453904324. The cubic root of 665353413 is about 873.0064712974.

The spelling of 665353413 in words is "six hundred sixty-five million, three hundred fifty-three thousand, four hundred thirteen".