666770003 has 4 divisors (see below), whose sum is σ = 683032728. Its totient is φ = 650507280.

The previous prime is 666769993. The next prime is 666770009. The reversal of 666770003 is 300077666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666770003 - 2²² = 662575699 is a prime.

It is a super-4 number, since 4×666770003⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666770009) 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 3 ways as a sum of consecutive naturals, for example, 8131301 + ... + 8131382.

It is an arithmetic number, because the mean of its divisors is an integer number (170758182).

Almost surely, 2^666770003 is an apocalyptic number.

666770003 is a deficient number, since it is larger than the sum of its proper divisors (16262725).

666770003 is a wasteful number, since it uses less digits than its factorization.

666770003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16262724.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 666770003 is about 25821.8899966676. The cubic root of 666770003 is about 873.6255987054.

The spelling of 666770003 in words is "six hundred sixty-six million, seven hundred seventy thousand, three".