66566055101051 has 4 divisors (see below), whose sum is σ = 72617514655704. Its totient is φ = 60514595546400.

The previous prime is 66566055100973. The next prime is 66566055101057. The reversal of 66566055101051 is 15010155066566.

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 66566055101051 - 2³⁸ = 66291177194107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66566055100987 and 66566055101005.

It is not an unprimeable number, because it can be changed into a prime (66566055101057) 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, 3025729777310 + ... + 3025729777331.

It is an arithmetic number, because the mean of its divisors is an integer number (18154378663926).

Almost surely, 2^{66566055101051} is an apocalyptic number.

66566055101051 is a deficient number, since it is larger than the sum of its proper divisors (6051459554653).

66566055101051 is a wasteful number, since it uses less digits than its factorization.

66566055101051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051459554652.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 66566055101051 in words is "sixty-six trillion, five hundred sixty-six billion, fifty-five million, one hundred one thousand, fifty-one".