665153523454 has 16 divisors (see below), whose sum is σ = 1140306321888. Its totient is φ = 285055011072.

The previous prime is 665153523451. The next prime is 665153523479. The reversal of 665153523454 is 454325351566.

It is a junction number, because it is equal to n+sod(n) for n = 665153523398 and 665153523407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665153523451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509647 + ... + 1260970.

It is an arithmetic number, because the mean of its divisors is an integer number (71269145118).

Almost surely, 2^665153523454 is an apocalyptic number.

665153523454 is a deficient number, since it is larger than the sum of its proper divisors (475152798434).

665153523454 is a wasteful number, since it uses less digits than its factorization.

665153523454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797459.

The product of its digits is 6480000, while the sum is 49.

The spelling of 665153523454 in words is "six hundred sixty-five billion, one hundred fifty-three million, five hundred twenty-three thousand, four hundred fifty-four".