667173253 has 2 divisors, whose sum is σ = 667173254. Its totient is φ = 667173252.

The previous prime is 667173223. The next prime is 667173257. The reversal of 667173253 is 352371766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623850529 + 43322724 = 24977^2 + 6582^2 .

It is a cyclic number.

It is not a de Polignac number, because 667173253 - 2²¹ = 665076101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667173257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333586626 + 333586627.

It is an arithmetic number, because the mean of its divisors is an integer number (333586627).

Almost surely, 2^667173253 is an apocalyptic number.

It is an amenable number.

667173253 is a deficient number, since it is larger than the sum of its proper divisors (1).

667173253 is an equidigital number, since it uses as much as digits as its factorization.

667173253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 40.

The square root of 667173253 is about 25829.6971139810. The cubic root of 667173253 is about 873.8016806755.

The spelling of 667173253 in words is "six hundred sixty-seven million, one hundred seventy-three thousand, two hundred fifty-three".