667894534 has 32 divisors (see below), whose sum is σ = 1062720000. Its totient is φ = 314297760.

The previous prime is 667894529. The next prime is 667894541. The reversal of 667894534 is 435498766.

667894534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1338217 + ... + 1338715.

It is an arithmetic number, because the mean of its divisors is an integer number (33210000).

Almost surely, 2^667894534 is an apocalyptic number.

667894534 is a deficient number, since it is larger than the sum of its proper divisors (394825466).

667894534 is a wasteful number, since it uses less digits than its factorization.

667894534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068.

The product of its digits is 4354560, while the sum is 52.

The square root of 667894534 is about 25843.6555850754. The cubic root of 667894534 is about 874.1164562655.

The spelling of 667894534 in words is "six hundred sixty-seven million, eight hundred ninety-four thousand, five hundred thirty-four".