667445073901 has 2 divisors, whose sum is σ = 667445073902. Its totient is φ = 667445073900.

The previous prime is 667445073811. The next prime is 667445073923. The reversal of 667445073901 is 109370544766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366593920900 + 300851153001 = 605470^2 + 548499^2 .

It is a cyclic number.

It is not a de Polignac number, because 667445073901 - 2²¹ = 667442976749 is a prime.

It is a super-2 number, since 2×667445073901² (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 (667445073301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333722536950 + 333722536951.

It is an arithmetic number, because the mean of its divisors is an integer number (333722536951).

Almost surely, 2^667445073901 is an apocalyptic number.

It is an amenable number.

667445073901 is a deficient number, since it is larger than the sum of its proper divisors (1).

667445073901 is an equidigital number, since it uses as much as digits as its factorization.

667445073901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 667445073901 in words is "six hundred sixty-seven billion, four hundred forty-five million, seventy-three thousand, nine hundred one".