665125629405 has 32 divisors (see below), whose sum is σ = 1069163573760. Its totient is φ = 353083315200.

The previous prime is 665125629403. The next prime is 665125629419. The reversal of 665125629405 is 504926521566.

It is not a de Polignac number, because 665125629405 - 2¹ = 665125629403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665125629403) 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, 2665531 + ... + 2904359.

It is an arithmetic number, because the mean of its divisors is an integer number (33411361680).

Almost surely, 2^665125629405 is an apocalyptic number.

It is an amenable number.

665125629405 is a deficient number, since it is larger than the sum of its proper divisors (404037944355).

665125629405 is a wasteful number, since it uses less digits than its factorization.

665125629405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239701.

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 665125629405 in words is "six hundred sixty-five billion, one hundred twenty-five million, six hundred twenty-nine thousand, four hundred five".