672322165616551 has 2 divisors, whose sum is σ = 672322165616552. Its totient is φ = 672322165616550.

The previous prime is 672322165616501. The next prime is 672322165616617. The reversal of 672322165616551 is 155616561223276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 672322165616551 - 2²⁹ = 672321628745639 is a prime.

It is a super-4 number, since 4×672322165616551⁴ (a number of 60 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672322165616501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336161082808275 + 336161082808276.

It is an arithmetic number, because the mean of its divisors is an integer number (336161082808276).

Almost surely, 2^{672322165616551} is an apocalyptic number.

672322165616551 is a deficient number, since it is larger than the sum of its proper divisors (1).

672322165616551 is an equidigital number, since it uses as much as digits as its factorization.

672322165616551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216000, while the sum is 58.

The spelling of 672322165616551 in words is "six hundred seventy-two trillion, three hundred twenty-two billion, one hundred sixty-five million, six hundred sixteen thousand, five hundred fifty-one".