66266653135551 has 16 divisors (see below), whose sum is σ = 96388306767360. Its totient is φ = 40161421435520.

The previous prime is 66266653135541. The next prime is 66266653135601. The reversal of 66266653135551 is 15553135666266.

It is not a de Polignac number, because 66266653135551 - 2⁵ = 66266653135519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66266653135531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2724586 + ... + 11830328.

It is an arithmetic number, because the mean of its divisors is an integer number (6024269172960).

Almost surely, 2^{66266653135551} is an apocalyptic number.

66266653135551 is a deficient number, since it is larger than the sum of its proper divisors (30121653631809).

66266653135551 is a wasteful number, since it uses less digits than its factorization.

66266653135551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9326286.

The product of its digits is 87480000, while the sum is 60.

The spelling of 66266653135551 in words is "sixty-six trillion, two hundred sixty-six billion, six hundred fifty-three million, one hundred thirty-five thousand, five hundred fifty-one".