667834434 has 24 divisors (see below), whose sum is σ = 1464411312. Its totient is φ = 219928920.

The previous prime is 667834429. The next prime is 667834451. The reversal of 667834434 is 434438766.

It is a super-2 number, since 2×667834434² = 892005662472200712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 667834434.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222012 + ... + 224999.

It is an arithmetic number, because the mean of its divisors is an integer number (61017138).

Almost surely, 2^667834434 is an apocalyptic number.

667834434 is an abundant number, since it is smaller than the sum of its proper divisors (796576878).

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

667834434 is a wasteful number, since it uses less digits than its factorization.

667834434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447102 (or 447099 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 45.

The square root of 667834434 is about 25842.4927977159. The cubic root of 667834434 is about 874.0902365695.

It can be divided in two parts, 66783 and 4434, that added together give a palindrome (71217).

The spelling of 667834434 in words is "six hundred sixty-seven million, eight hundred thirty-four thousand, four hundred thirty-four".