66140044 has 24 divisors (see below), whose sum is σ = 118787760. Its totient is φ = 32212224.

The previous prime is 66140033. The next prime is 66140069. The reversal of 66140044 is 44004166.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22872 + ... + 25600.

It is an arithmetic number, because the mean of its divisors is an integer number (4949490).

Almost surely, 2^66140044 is an apocalyptic number.

It is an amenable number.

66140044 is a deficient number, since it is larger than the sum of its proper divisors (52647716).

66140044 is a wasteful number, since it uses less digits than its factorization.

66140044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889 (or 2887 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 66140044 is about 8132.6529496838. The cubic root of 66140044 is about 404.4096341810.

The spelling of 66140044 in words is "sixty-six million, one hundred forty thousand, forty-four".