665431434 has 24 divisors (see below), whose sum is σ = 1443393120. Its totient is φ = 221560488.

The previous prime is 665431411. The next prime is 665431439. The reversal of 665431434 is 434134566.

It is not an unprimeable number, because it can be changed into a prime (665431439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4054 + ... + 36705.

It is an arithmetic number, because the mean of its divisors is an integer number (60141380).

Almost surely, 2^665431434 is an apocalyptic number.

665431434 is an abundant number, since it is smaller than the sum of its proper divisors (777961686).

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

665431434 is a wasteful number, since it uses less digits than its factorization.

665431434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41674 (or 41671 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 665431434 is about 25795.9577065865. The cubic root of 665431434 is about 873.0405936021.

The spelling of 665431434 in words is "six hundred sixty-five million, four hundred thirty-one thousand, four hundred thirty-four".