667461967 has 2 divisors, whose sum is σ = 667461968. Its totient is φ = 667461966.

The previous prime is 667461923. The next prime is 667461979. The reversal of 667461967 is 769164766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667461967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667461917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333730983 + 333730984.

It is an arithmetic number, because the mean of its divisors is an integer number (333730984).

Almost surely, 2^667461967 is an apocalyptic number.

667461967 is a deficient number, since it is larger than the sum of its proper divisors (1).

667461967 is an equidigital number, since it uses as much as digits as its factorization.

667461967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 52.

The square root of 667461967 is about 25835.2853090497. The cubic root of 667461967 is about 873.9277061097.

The spelling of 667461967 in words is "six hundred sixty-seven million, four hundred sixty-one thousand, nine hundred sixty-seven".