66140315 has 4 divisors (see below), whose sum is σ = 79368384. Its totient is φ = 52912248.

The previous prime is 66140297. The next prime is 66140351. The reversal of 66140315 is 51304166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66140315 - 2¹⁰ = 66139291 is a prime.

It is a Duffinian 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, 6614027 + ... + 6614036.

It is an arithmetic number, because the mean of its divisors is an integer number (19842096).

Almost surely, 2^66140315 is an apocalyptic number.

66140315 is a deficient number, since it is larger than the sum of its proper divisors (13228069).

66140315 is a wasteful number, since it uses less digits than its factorization.

66140315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13228068.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 66140315 is about 8132.6696108965. The cubic root of 66140315 is about 404.4101865184.

The spelling of 66140315 in words is "sixty-six million, one hundred forty thousand, three hundred fifteen".