672182373221 has 2 divisors, whose sum is σ = 672182373222. Its totient is φ = 672182373220.

The previous prime is 672182373197. The next prime is 672182373257. The reversal of 672182373221 is 122373281276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428258992225 + 243923380996 = 654415^2 + 493886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672182373221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672182370221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336091186610 + 336091186611.

It is an arithmetic number, because the mean of its divisors is an integer number (336091186611).

Almost surely, 2^672182373221 is an apocalyptic number.

It is an amenable number.

672182373221 is a deficient number, since it is larger than the sum of its proper divisors (1).

672182373221 is an equidigital number, since it uses as much as digits as its factorization.

672182373221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The spelling of 672182373221 in words is "six hundred seventy-two billion, one hundred eighty-two million, three hundred seventy-three thousand, two hundred twenty-one".