66138003 has 6 divisors (see below), whose sum is σ = 95532684. Its totient is φ = 44091996.

The previous prime is 66138001. The next prime is 66138019. The reversal of 66138003 is 30083166.

It is not a de Polignac number, because 66138003 - 2¹ = 66138001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66138001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3674325 + ... + 3674342.

It is an arithmetic number, because the mean of its divisors is an integer number (15922114).

Almost surely, 2^66138003 is an apocalyptic number.

66138003 is a deficient number, since it is larger than the sum of its proper divisors (29394681).

66138003 is a wasteful number, since it uses less digits than its factorization.

66138003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7348673 (or 7348670 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66138003 is about 8132.5274669072. The cubic root of 66138003 is about 404.4054742778.

The spelling of 66138003 in words is "sixty-six million, one hundred thirty-eight thousand, three".