66712803 has 16 divisors (see below), whose sum is σ = 90039936. Its totient is φ = 43934400.

The previous prime is 66712801. The next prime is 66712829. The reversal of 66712803 is 30821766.

It is not a de Polignac number, because 66712803 - 2¹ = 66712801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66712801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110703 + ... + 111303.

It is an arithmetic number, because the mean of its divisors is an integer number (5627496).

Almost surely, 2^66712803 is an apocalyptic number.

66712803 is a deficient number, since it is larger than the sum of its proper divisors (23327133).

66712803 is a wasteful number, since it uses less digits than its factorization.

66712803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 66712803 is about 8167.7905825260. The cubic root of 66712803 is about 405.5736483022.

The spelling of 66712803 in words is "sixty-six million, seven hundred twelve thousand, eight hundred three".