667553009 has 2 divisors, whose sum is σ = 667553010. Its totient is φ = 667553008.

The previous prime is 667552999. The next prime is 667553017. The reversal of 667553009 is 900355766.

667553009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 626400784 + 41152225 = 25028^2 + 6415^2 .

It is a cyclic number.

It is not a de Polignac number, because 667553009 - 2⁴ = 667552993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (667553309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333776504 + 333776505.

It is an arithmetic number, because the mean of its divisors is an integer number (333776505).

Almost surely, 2^667553009 is an apocalyptic number.

It is an amenable number.

667553009 is a deficient number, since it is larger than the sum of its proper divisors (1).

667553009 is an equidigital number, since it uses as much as digits as its factorization.

667553009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 41.

The square root of 667553009 is about 25837.0472190612. The cubic root of 667553009 is about 873.9674389648.

The spelling of 667553009 in words is "six hundred sixty-seven million, five hundred fifty-three thousand, nine".