665425434 has 16 divisors (see below), whose sum is σ = 1332001440. Its totient is φ = 221616720.

The previous prime is 665425433. The next prime is 665425451. The reversal of 665425434 is 434524566.

665425434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 665425392 and 665425401.

It is not an unprimeable number, because it can be changed into a prime (665425433) 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, 40329 + ... + 54380.

It is an arithmetic number, because the mean of its divisors is an integer number (83250090).

Almost surely, 2^665425434 is an apocalyptic number.

665425434 is an abundant number, since it is smaller than the sum of its proper divisors (666576006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665425434 is a wasteful number, since it uses less digits than its factorization.

665425434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95885.

The product of its digits is 345600, while the sum is 39.

The square root of 665425434 is about 25795.8414090334. The cubic root of 665425434 is about 873.0379696106.

The spelling of 665425434 in words is "six hundred sixty-five million, four hundred twenty-five thousand, four hundred thirty-four".