66140572 has 12 divisors (see below), whose sum is σ = 115804080. Its totient is φ = 33053696.

The previous prime is 66140563. The next prime is 66140587. The reversal of 66140572 is 27504166.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10833 + ... + 15799.

It is an arithmetic number, because the mean of its divisors is an integer number (9650340).

Almost surely, 2^66140572 is an apocalyptic number.

It is an amenable number.

66140572 is a deficient number, since it is larger than the sum of its proper divisors (49663508).

66140572 is a wasteful number, since it uses less digits than its factorization.

66140572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8300 (or 8298 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 66140572 is about 8132.6854113509. The cubic root of 66140572 is about 404.4107103204.

The spelling of 66140572 in words is "sixty-six million, one hundred forty thousand, five hundred seventy-two".