666877033 has 2 divisors, whose sum is σ = 666877034. Its totient is φ = 666877032.

The previous prime is 666877009. The next prime is 666877117. The reversal of 666877033 is 330778666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654745744 + 12131289 = 25588^2 + 3483^2 .

It is a cyclic number.

It is not a de Polignac number, because 666877033 - 2²⁵ = 633322601 is a prime.

It is not a weakly prime, because it can be changed into another prime (666877933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333438516 + 333438517.

It is an arithmetic number, because the mean of its divisors is an integer number (333438517).

Almost surely, 2^666877033 is an apocalyptic number.

It is an amenable number.

666877033 is a deficient number, since it is larger than the sum of its proper divisors (1).

666877033 is an equidigital number, since it uses as much as digits as its factorization.

666877033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 46.

The square root of 666877033 is about 25823.9623799292. The cubic root of 666877033 is about 873.6723410328.

The spelling of 666877033 in words is "six hundred sixty-six million, eight hundred seventy-seven thousand, thirty-three".