667589057 has 2 divisors, whose sum is σ = 667589058. Its totient is φ = 667589056.

The previous prime is 667589033. The next prime is 667589137. The reversal of 667589057 is 750985766.

It is a happy number.

667589057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455566336 + 212022721 = 21344^2 + 14561^2 .

It is a cyclic number.

It is not a de Polignac number, because 667589057 - 2⁶ = 667588993 is a prime.

It is a super-2 number, since 2×667589057² = 891350298052298498, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (667589957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333794528 + 333794529.

It is an arithmetic number, because the mean of its divisors is an integer number (333794529).

Almost surely, 2^667589057 is an apocalyptic number.

It is an amenable number.

667589057 is a deficient number, since it is larger than the sum of its proper divisors (1).

667589057 is an equidigital number, since it uses as much as digits as its factorization.

667589057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The square root of 667589057 is about 25837.7448125799. The cubic root of 667589057 is about 873.9831701556.

The spelling of 667589057 in words is "six hundred sixty-seven million, five hundred eighty-nine thousand, fifty-seven".