665414621253 has 48 divisors (see below), whose sum is σ = 994448931840. Its totient is φ = 428514720768.

The previous prime is 665414621191. The next prime is 665414621257. The reversal of 665414621253 is 352126414566.

665414621253 is a `hidden beast` number, since 6 + 6 + 5 + 4 + 14 + 621 + 2 + 5 + 3 = 666.

It is not a de Polignac number, because 665414621253 - 2¹⁶ = 665414555717 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 665414621199 and 665414621208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665414621257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15036283 + ... + 15080471.

It is an arithmetic number, because the mean of its divisors is an integer number (20717686080).

Almost surely, 2^665414621253 is an apocalyptic number.

It is an amenable number.

665414621253 is a deficient number, since it is larger than the sum of its proper divisors (329034310587).

665414621253 is a wasteful number, since it uses less digits than its factorization.

665414621253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44706 (or 44703 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 665414621253 in words is "six hundred sixty-five billion, four hundred fourteen million, six hundred twenty-one thousand, two hundred fifty-three".