667361317251 has 32 divisors (see below), whose sum is σ = 910939696128. Its totient is φ = 434428600320.

The previous prime is 667361317247. The next prime is 667361317277. The reversal of 667361317251 is 152713163766.

It is not a de Polignac number, because 667361317251 - 2² = 667361317247 is a prime.

It is a super-2 number, since 2×667361317251² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 667361317251.

It is not an unprimeable number, because it can be changed into a prime (667361317451) 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 31 ways as a sum of consecutive naturals, for example, 50295720 + ... + 50308986.

It is an arithmetic number, because the mean of its divisors is an integer number (28466865504).

Almost surely, 2^667361317251 is an apocalyptic number.

667361317251 is a deficient number, since it is larger than the sum of its proper divisors (243578378877).

667361317251 is a wasteful number, since it uses less digits than its factorization.

667361317251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14811.

The product of its digits is 952560, while the sum is 48.

The spelling of 667361317251 in words is "six hundred sixty-seven billion, three hundred sixty-one million, three hundred seventeen thousand, two hundred fifty-one".