667116451 has 2 divisors, whose sum is σ = 667116452. Its totient is φ = 667116450.

The previous prime is 667116427. The next prime is 667116469. The reversal of 667116451 is 154611766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667116451 - 2⁷ = 667116323 is a prime.

It is equal to p_34636582 and since 667116451 and 34636582 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667116451.

It is not a weakly prime, because it can be changed into another prime (667113451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333558225 + 333558226.

It is an arithmetic number, because the mean of its divisors is an integer number (333558226).

Almost surely, 2^667116451 is an apocalyptic number.

667116451 is a deficient number, since it is larger than the sum of its proper divisors (1).

667116451 is an equidigital number, since it uses as much as digits as its factorization.

667116451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 667116451 is about 25828.5975422592. The cubic root of 667116451 is about 873.7768819737.

The spelling of 667116451 in words is "six hundred sixty-seven million, one hundred sixteen thousand, four hundred fifty-one".