66195195610051 has 4 divisors (see below), whose sum is σ = 66195223036672. Its totient is φ = 66195168183432.

The previous prime is 66195195610013. The next prime is 66195195610207. The reversal of 66195195610051 is 15001659159166.

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 66195195610051 - 2⁹ = 66195195609539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66195195609974 and 66195195610001.

It is not an unprimeable number, because it can be changed into a prime (66195195613051) 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, 9701856 + ... + 15050461.

It is an arithmetic number, because the mean of its divisors is an integer number (16548805759168).

Almost surely, 2^{66195195610051} is an apocalyptic number.

66195195610051 is a deficient number, since it is larger than the sum of its proper divisors (27426621).

66195195610051 is a wasteful number, since it uses less digits than its factorization.

66195195610051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27426620.

The product of its (nonzero) digits is 2187000, while the sum is 55.

The spelling of 66195195610051 in words is "sixty-six trillion, one hundred ninety-five billion, one hundred ninety-five million, six hundred ten thousand, fifty-one".