66151105171005 has 64 divisors (see below), whose sum is σ = 110581988548608. Its totient is φ = 33704387608320.

The previous prime is 66151105170991. The next prime is 66151105171007. The reversal of 66151105171005 is 50017150115166.

It is not a de Polignac number, because 66151105171005 - 2³¹ = 66148957687357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66151105171007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 898669912 + ... + 898743518.

It is an arithmetic number, because the mean of its divisors is an integer number (1727843571072).

Almost surely, 2^{66151105171005} is an apocalyptic number.

It is an amenable number.

66151105171005 is a deficient number, since it is larger than the sum of its proper divisors (44430883377603).

66151105171005 is a wasteful number, since it uses less digits than its factorization.

66151105171005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76866.

The product of its (nonzero) digits is 31500, while the sum is 39.

The spelling of 66151105171005 in words is "sixty-six trillion, one hundred fifty-one billion, one hundred five million, one hundred seventy-one thousand, five".