667555434 has 96 divisors (see below), whose sum is σ = 1794723840. Its totient is φ = 174617856.

The previous prime is 667555417. The next prime is 667555453. The reversal of 667555434 is 434555766.

667555434 is a `hidden beast` number, since 6 + 67 + 5 + 554 + 34 = 666.

667555434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 667555434.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206422 + ... + 209630.

It is an arithmetic number, because the mean of its divisors is an integer number (18695040).

Almost surely, 2^667555434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667555434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897361920).

667555434 is an abundant number, since it is smaller than the sum of its proper divisors (1127168406).

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

667555434 is a wasteful number, since it uses less digits than its factorization.

667555434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364 (or 3361 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 45.

The square root of 667555434 is about 25837.0941477559. The cubic root of 667555434 is about 873.9684972421.

The spelling of 667555434 in words is "six hundred sixty-seven million, five hundred fifty-five thousand, four hundred thirty-four".