667728599 has 2 divisors, whose sum is σ = 667728600. Its totient is φ = 667728598.

The previous prime is 667728569. The next prime is 667728613. The reversal of 667728599 is 995827766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667728599 is a prime.

It is a super-2 number, since 2×667728599² = 891722963845005602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667728539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333864299 + 333864300.

It is an arithmetic number, because the mean of its divisors is an integer number (333864300).

Almost surely, 2^667728599 is an apocalyptic number.

667728599 is a deficient number, since it is larger than the sum of its proper divisors (1).

667728599 is an equidigital number, since it uses as much as digits as its factorization.

667728599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 59.

The square root of 667728599 is about 25840.4450232576. The cubic root of 667728599 is about 874.0440603404.

The spelling of 667728599 in words is "six hundred sixty-seven million, seven hundred twenty-eight thousand, five hundred ninety-nine".