667407373 has 2 divisors, whose sum is σ = 667407374. Its totient is φ = 667407372.

The previous prime is 667407371. The next prime is 667407383. The reversal of 667407373 is 373704766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 592532964 + 74874409 = 24342^2 + 8653^2 .

It is a cyclic number.

It is not a de Polignac number, because 667407373 - 2¹ = 667407371 is a prime.

It is a super-2 number, since 2×667407373² = 890865203069522258, which contains 22 as substring.

Together with 667407371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667407371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333703686 + 333703687.

It is an arithmetic number, because the mean of its divisors is an integer number (333703687).

Almost surely, 2^667407373 is an apocalyptic number.

It is an amenable number.

667407373 is a deficient number, since it is larger than the sum of its proper divisors (1).

667407373 is an equidigital number, since it uses as much as digits as its factorization.

667407373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 43.

The square root of 667407373 is about 25834.2287092144. The cubic root of 667407373 is about 873.9038782801.

The spelling of 667407373 in words is "six hundred sixty-seven million, four hundred seven thousand, three hundred seventy-three".