66672703 has 4 divisors (see below), whose sum is σ = 66776400. Its totient is φ = 66569008.

The previous prime is 66672679. The next prime is 66672707. The reversal of 66672703 is 30727666.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66672703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66672707) 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, 50878 + ... + 52171.

It is an arithmetic number, because the mean of its divisors is an integer number (16694100).

Almost surely, 2^66672703 is an apocalyptic number.

66672703 is a deficient number, since it is larger than the sum of its proper divisors (103697).

66672703 is a wasteful number, since it uses less digits than its factorization.

66672703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103696.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 66672703 is about 8165.3354493248. The cubic root of 66672703 is about 405.4923707351.

The spelling of 66672703 in words is "sixty-six million, six hundred seventy-two thousand, seven hundred three".