66366015 has 16 divisors (see below), whose sum is σ = 106413696. Its totient is φ = 35319200.

The previous prime is 66365969. The next prime is 66366023. The reversal of 66366015 is 51066366.

It is not a de Polignac number, because 66366015 - 2¹⁵ = 66333247 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 2860 + ... + 11870.

It is an arithmetic number, because the mean of its divisors is an integer number (6650856).

Almost surely, 2^66366015 is an apocalyptic number.

66366015 is a deficient number, since it is larger than the sum of its proper divisors (40047681).

66366015 is a wasteful number, since it uses less digits than its factorization.

66366015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9510.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 66366015 is about 8146.5339255416. The cubic root of 66366015 is about 404.8696730484.

The spelling of 66366015 in words is "sixty-six million, three hundred sixty-six thousand, fifteen".