372665221717 has 2 divisors, whose sum is σ = 372665221718. Its totient is φ = 372665221716.

The previous prime is 372665221711. The next prime is 372665221729. The reversal of 372665221717 is 717122566273.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363746496996 + 8918724721 = 603114^2 + 94439^2 .

It is a cyclic number.

It is not a de Polignac number, because 372665221717 - 2¹⁵ = 372665188949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (372665221711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186332610858 + 186332610859.

It is an arithmetic number, because the mean of its divisors is an integer number (186332610859).

Almost surely, 2^372665221717 is an apocalyptic number.

It is an amenable number.

372665221717 is a deficient number, since it is larger than the sum of its proper divisors (1).

372665221717 is an equidigital number, since it uses as much as digits as its factorization.

372665221717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 49.

The spelling of 372665221717 in words is "three hundred seventy-two billion, six hundred sixty-five million, two hundred twenty-one thousand, seven hundred seventeen".