66201066515 has 8 divisors (see below), whose sum is σ = 79662566880. Its totient is φ = 52813328512.

The previous prime is 66201066493. The next prime is 66201066563. The reversal of 66201066515 is 51566010266.

66201066515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66201066515 - 2²² = 66196872211 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18438614 + ... + 18442203.

It is an arithmetic number, because the mean of its divisors is an integer number (9957820860).

Almost surely, 2^66201066515 is an apocalyptic number.

66201066515 is a deficient number, since it is larger than the sum of its proper divisors (13461500365).

66201066515 is a wasteful number, since it uses less digits than its factorization.

66201066515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36881181.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 66201066515 in words is "sixty-six billion, two hundred one million, sixty-six thousand, five hundred fifteen".