66138002 has 16 divisors (see below), whose sum is σ = 116145792. Its totient is φ = 27653280.

The previous prime is 66138001. The next prime is 66138019. The reversal of 66138002 is 20083166.

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 7 ways as a sum of consecutive naturals, for example, 57038 + ... + 58185.

It is an arithmetic number, because the mean of its divisors is an integer number (7259112).

Almost surely, 2^66138002 is an apocalyptic number.

66138002 is a deficient number, since it is larger than the sum of its proper divisors (50007790).

66138002 is a wasteful number, since it uses less digits than its factorization.

66138002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115273.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 66138002 is about 8132.5274054257. The cubic root of 66138002 is about 404.4054722396.

The spelling of 66138002 in words is "sixty-six million, one hundred thirty-eight thousand, two".