66005015 has 16 divisors (see below), whose sum is σ = 82766880. Its totient is φ = 50467200.

The previous prime is 66004987. The next prime is 66005021. The reversal of 66005015 is 51050066.

It is not a de Polignac number, because 66005015 - 2⁶ = 66004951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12392 + ... + 16898.

It is an arithmetic number, because the mean of its divisors is an integer number (5172930).

Almost surely, 2^66005015 is an apocalyptic number.

66005015 is a deficient number, since it is larger than the sum of its proper divisors (16761865).

66005015 is a wasteful number, since it uses less digits than its factorization.

66005015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4642.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 66005015 is about 8124.3470506866. The cubic root of 66005015 is about 404.1342375700.

The spelling of 66005015 in words is "sixty-six million, five thousand, fifteen".