66566636335 has 4 divisors (see below), whose sum is σ = 79879963608. Its totient is φ = 53253309064.

The previous prime is 66566636333. The next prime is 66566636341. The reversal of 66566636335 is 53363666566.

It is a happy number.

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 66566636335 - 2¹ = 66566636333 is a prime.

It is a super-2 number, since 2×66566636335² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66566636333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6656663629 + ... + 6656663638.

It is an arithmetic number, because the mean of its divisors is an integer number (19969990902).

Almost surely, 2^66566636335 is an apocalyptic number.

66566636335 is a deficient number, since it is larger than the sum of its proper divisors (13313327273).

66566636335 is a wasteful number, since it uses less digits than its factorization.

66566636335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13313327272.

The product of its digits is 31492800, while the sum is 55.

The spelling of 66566636335 in words is "sixty-six billion, five hundred sixty-six million, six hundred thirty-six thousand, three hundred thirty-five".