667674347444 has 24 divisors (see below), whose sum is σ = 1259597374728. Its totient is φ = 307841955840.

The previous prime is 667674347443. The next prime is 667674347477. The reversal of 667674347444 is 444743476766.

It can be written as a sum of positive squares in 4 ways, for example, as 250180032400 + 417494315044 = 500180^2 + 646138^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667674347443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6520277 + ... + 6621884.

It is an arithmetic number, because the mean of its divisors is an integer number (52483223947).

Almost surely, 2^667674347444 is an apocalyptic number.

It is an amenable number.

667674347444 is a deficient number, since it is larger than the sum of its proper divisors (591923027284).

667674347444 is a wasteful number, since it uses less digits than its factorization.

667674347444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13143155 (or 13143153 counting only the distinct ones).

The product of its digits is 227598336, while the sum is 62.

The spelling of 667674347444 in words is "six hundred sixty-seven billion, six hundred seventy-four million, three hundred forty-seven thousand, four hundred forty-four".