667233961 has 2 divisors, whose sum is σ = 667233962. Its totient is φ = 667233960.

The previous prime is 667233923. The next prime is 667233989. The reversal of 667233961 is 169332766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 653313600 + 13920361 = 25560^2 + 3731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667233961 is a prime.

It is not a weakly prime, because it can be changed into another prime (667233991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333616980 + 333616981.

It is an arithmetic number, because the mean of its divisors is an integer number (333616981).

Almost surely, 2^667233961 is an apocalyptic number.

It is an amenable number.

667233961 is a deficient number, since it is larger than the sum of its proper divisors (1).

667233961 is an equidigital number, since it uses as much as digits as its factorization.

667233961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 43.

The square root of 667233961 is about 25830.8722462096. The cubic root of 667233961 is about 873.8281831086.

The spelling of 667233961 in words is "six hundred sixty-seven million, two hundred thirty-three thousand, nine hundred sixty-one".