667446433 has 2 divisors, whose sum is σ = 667446434. Its totient is φ = 667446432.

The previous prime is 667446391. The next prime is 667446443. The reversal of 667446433 is 334644766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 627352209 + 40094224 = 25047^2 + 6332^2 .

It is a cyclic number.

It is not a de Polignac number, because 667446433 - 2⁹ = 667445921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667446433.

It is not a weakly prime, because it can be changed into another prime (667446443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333723216 + 333723217.

It is an arithmetic number, because the mean of its divisors is an integer number (333723217).

Almost surely, 2^667446433 is an apocalyptic number.

It is an amenable number.

667446433 is a deficient number, since it is larger than the sum of its proper divisors (1).

667446433 is an equidigital number, since it uses as much as digits as its factorization.

667446433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 43.

The square root of 667446433 is about 25834.9846719521. The cubic root of 667446433 is about 873.9209263485.

The spelling of 667446433 in words is "six hundred sixty-seven million, four hundred forty-six thousand, four hundred thirty-three".