667941433 has 2 divisors, whose sum is σ = 667941434. Its totient is φ = 667941432.

The previous prime is 667941431. The next prime is 667941437. The reversal of 667941433 is 334149766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635644944 + 32296489 = 25212^2 + 5683^2 .

It is a cyclic number.

It is not a de Polignac number, because 667941433 - 2¹ = 667941431 is a prime.

It is a super-2 number, since 2×667941433² = 892291515836186978, which contains 22 as substring.

Together with 667941431, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 667941433.

It is not a weakly prime, because it can be changed into another prime (667941431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333970716 + 333970717.

It is an arithmetic number, because the mean of its divisors is an integer number (333970717).

Almost surely, 2^667941433 is an apocalyptic number.

It is an amenable number.

667941433 is a deficient number, since it is larger than the sum of its proper divisors (1).

667941433 is an equidigital number, since it uses as much as digits as its factorization.

667941433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The square root of 667941433 is about 25844.5629291733. The cubic root of 667941433 is about 874.1369156973.

The spelling of 667941433 in words is "six hundred sixty-seven million, nine hundred forty-one thousand, four hundred thirty-three".