666770067 has 12 divisors (see below), whose sum is σ = 963586104. Its totient is φ = 444294720.

The previous prime is 666770063. The next prime is 666770089. The reversal of 666770067 is 760077666.

It is a happy number.

It is not a de Polignac number, because 666770067 - 2² = 666770063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666770063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2308 + ... + 36590.

It is an arithmetic number, because the mean of its divisors is an integer number (80298842).

Almost surely, 2^666770067 is an apocalyptic number.

666770067 is a deficient number, since it is larger than the sum of its proper divisors (296816037).

666770067 is a wasteful number, since it uses less digits than its factorization.

666770067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36450 (or 36447 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 45.

The square root of 666770067 is about 25821.8912359262. The cubic root of 666770067 is about 873.6256266571.

The spelling of 666770067 in words is "six hundred sixty-six million, seven hundred seventy thousand, sixty-seven".