66020656055 has 4 divisors (see below), whose sum is σ = 79224787272. Its totient is φ = 52816524840.

The previous prime is 66020656033. The next prime is 66020656067. The reversal of 66020656055 is 55065602066.

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

It is not a de Polignac number, because 66020656055 - 2²² = 66016461751 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, 6602065601 + ... + 6602065610.

It is an arithmetic number, because the mean of its divisors is an integer number (19806196818).

Almost surely, 2^66020656055 is an apocalyptic number.

66020656055 is a deficient number, since it is larger than the sum of its proper divisors (13204131217).

66020656055 is a wasteful number, since it uses less digits than its factorization.

66020656055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13204131216.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 66020656055 in words is "sixty-six billion, twenty million, six hundred fifty-six thousand, fifty-five".