66000715 has 16 divisors (see below), whose sum is σ = 91484640. Its totient is φ = 45176320.

The previous prime is 66000691. The next prime is 66000733. The reversal of 66000715 is 51700066.

It is not a de Polignac number, because 66000715 - 2⁷ = 66000587 is a prime.

It is a super-2 number, since 2×66000715² = 8712188761022450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66000715.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34360 + ... + 36229.

It is an arithmetic number, because the mean of its divisors is an integer number (5717790).

Almost surely, 2^66000715 is an apocalyptic number.

66000715 is a deficient number, since it is larger than the sum of its proper divisors (25483925).

66000715 is a wasteful number, since it uses less digits than its factorization.

66000715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70622.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 66000715 is about 8124.0824097248. The cubic root of 66000715 is about 404.1254613936.

The spelling of 66000715 in words is "sixty-six million, seven hundred fifteen", and thus it is an aban number.