66970003 has 4 divisors (see below), whose sum is σ = 70494760. Its totient is φ = 63445248.

The previous prime is 66969989. The next prime is 66970039. The reversal of 66970003 is 30007966.

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 66970003 - 2²¹ = 64872851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66970103) 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, 1762350 + ... + 1762387.

It is an arithmetic number, because the mean of its divisors is an integer number (17623690).

Almost surely, 2^66970003 is an apocalyptic number.

66970003 is a deficient number, since it is larger than the sum of its proper divisors (3524757).

66970003 is a wasteful number, since it uses less digits than its factorization.

66970003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524756.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 66970003 is about 8183.5202083211. The cubic root of 66970003 is about 406.0941869375.

Adding to 66970003 its reverse (30007966), we get a palindrome (96977969).

The spelling of 66970003 in words is "sixty-six million, nine hundred seventy thousand, three".