667752331 has 2 divisors, whose sum is σ = 667752332. Its totient is φ = 667752330.

The previous prime is 667752317. The next prime is 667752341. The reversal of 667752331 is 133257766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667752331 - 2¹⁹ = 667228043 is a prime.

It is a super-2 number, since 2×667752331² = 891786351111867122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (667752301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333876165 + 333876166.

It is an arithmetic number, because the mean of its divisors is an integer number (333876166).

Almost surely, 2^667752331 is an apocalyptic number.

667752331 is a deficient number, since it is larger than the sum of its proper divisors (1).

667752331 is an equidigital number, since it uses as much as digits as its factorization.

667752331 is an odious number, because the sum of its binary digits is odd.

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

The square root of 667752331 is about 25840.9042217953. The cubic root of 667752331 is about 874.0544151302.

The spelling of 667752331 in words is "six hundred sixty-seven million, seven hundred fifty-two thousand, three hundred thirty-one".