66006610515 has 24 divisors (see below), whose sum is σ = 121141545408. Its totient is φ = 33132729600.

The previous prime is 66006610499. The next prime is 66006610529. The reversal of 66006610515 is 51501660066.

It is not a de Polignac number, because 66006610515 - 2⁴ = 66006610499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66006610515.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43140811 + ... + 43142340.

It is an arithmetic number, because the mean of its divisors is an integer number (5047564392).

Almost surely, 2^66006610515 is an apocalyptic number.

66006610515 is a deficient number, since it is larger than the sum of its proper divisors (55134934893).

66006610515 is a wasteful number, since it uses less digits than its factorization.

66006610515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86283179 (or 86283176 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 66006610515 in words is "sixty-six billion, six million, six hundred ten thousand, five hundred fifteen".