667404373 has 2 divisors, whose sum is σ = 667404374. Its totient is φ = 667404372.

The previous prime is 667404359. The next prime is 667404389. The reversal of 667404373 is 373404766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 357890724 + 309513649 = 18918^2 + 17593^2 .

It is a cyclic number.

It is not a de Polignac number, because 667404373 - 2⁵ = 667404341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667404313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333702186 + 333702187.

It is an arithmetic number, because the mean of its divisors is an integer number (333702187).

Almost surely, 2^667404373 is an apocalyptic number.

It is an amenable number.

667404373 is a deficient number, since it is larger than the sum of its proper divisors (1).

667404373 is an equidigital number, since it uses as much as digits as its factorization.

667404373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 40.

The square root of 667404373 is about 25834.1706466455. The cubic root of 667404373 is about 873.9025688771.

The spelling of 667404373 in words is "six hundred sixty-seven million, four hundred four thousand, three hundred seventy-three".