667670801767 has 2 divisors, whose sum is σ = 667670801768. Its totient is φ = 667670801766.

The previous prime is 667670801761. The next prime is 667670801797. The reversal of 667670801767 is 767108076766.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667670801767 is a prime.

It is a super-2 number, since 2×667670801767² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667670801761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333835400883 + 333835400884.

It is an arithmetic number, because the mean of its divisors is an integer number (333835400884).

Almost surely, 2^667670801767 is an apocalyptic number.

667670801767 is a deficient number, since it is larger than the sum of its proper divisors (1).

667670801767 is an equidigital number, since it uses as much as digits as its factorization.

667670801767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24893568, while the sum is 61.

The spelling of 667670801767 in words is "six hundred sixty-seven billion, six hundred seventy million, eight hundred one thousand, seven hundred sixty-seven".