66060055615 has 4 divisors (see below), whose sum is σ = 79272066744. Its totient is φ = 52848044488.

The previous prime is 66060055603. The next prime is 66060055631. The reversal of 66060055615 is 51655006066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66060055615 - 2¹¹ = 66060053567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6606005557 + ... + 6606005566.

It is an arithmetic number, because the mean of its divisors is an integer number (19818016686).

Almost surely, 2^66060055615 is an apocalyptic number.

66060055615 is a deficient number, since it is larger than the sum of its proper divisors (13212011129).

66060055615 is a wasteful number, since it uses less digits than its factorization.

66060055615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13212011128.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 66060055615 in words is "sixty-six billion, sixty million, fifty-five thousand, six hundred fifteen".