667806734804 has 48 divisors (see below), whose sum is σ = 1312790443776. Its totient is φ = 297089925440.

The previous prime is 667806734797. The next prime is 667806734809. The reversal of 667806734804 is 408437608766.

667806734804 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 not an unprimeable number, because it can be changed into a prime (667806734809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1084169 + ... + 1584624.

It is an arithmetic number, because the mean of its divisors is an integer number (27349800912).

Almost surely, 2^667806734804 is an apocalyptic number.

It is an amenable number.

667806734804 is a deficient number, since it is larger than the sum of its proper divisors (644983708972).

667806734804 is a wasteful number, since it uses less digits than its factorization.

667806734804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668877 (or 2668853 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 59.

The spelling of 667806734804 in words is "six hundred sixty-seven billion, eight hundred six million, seven hundred thirty-four thousand, eight hundred four".