667373394320 has 20 divisors (see below), whose sum is σ = 1551643141980. Its totient is φ = 266949357696.

The previous prime is 667373394293. The next prime is 667373394323. The reversal of 667373394320 is 23493373766.

It can be written as a sum of positive squares in 2 ways, for example, as 155541894544 + 511831499776 = 394388^2 + 715424^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (667373394323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4171083635 + ... + 4171083794.

It is an arithmetic number, because the mean of its divisors is an integer number (77582157099).

Almost surely, 2^667373394320 is an apocalyptic number.

It is an amenable number.

667373394320 is an abundant number, since it is smaller than the sum of its proper divisors (884269747660).

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

667373394320 is a wasteful number, since it uses less digits than its factorization.

667373394320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8342167442 (or 8342167436 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 53.

The spelling of 667373394320 in words is "six hundred sixty-seven billion, three hundred seventy-three million, three hundred ninety-four thousand, three hundred twenty".