425738665 has 16 divisors (see below), whose sum is σ = 567850176. Its totient is φ = 303784000.

The previous prime is 425738609. The next prime is 425738683. The reversal of 425738665 is 566837524.

It is not a de Polignac number, because 425738665 - 2⁹ = 425738153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70111 + ... + 75940.

It is an arithmetic number, because the mean of its divisors is an integer number (35490636).

Almost surely, 2^425738665 is an apocalyptic number.

It is an amenable number.

425738665 is a deficient number, since it is larger than the sum of its proper divisors (142111511).

425738665 is a wasteful number, since it uses less digits than its factorization.

425738665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146120.

The product of its digits is 1209600, while the sum is 46.

The square root of 425738665 is about 20633.4356082549. The cubic root of 425738665 is about 752.2826250419.

The spelling of 425738665 in words is "four hundred twenty-five million, seven hundred thirty-eight thousand, six hundred sixty-five".