66254442154 has 16 divisors (see below), whose sum is σ = 102886535808. Its totient is φ = 31978240992.

The previous prime is 66254442143. The next prime is 66254442169. The reversal of 66254442154 is 45124445266.

It is a super-2 number, since 2×66254442154² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66254442154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4820772 + ... + 4834495.

It is an arithmetic number, because the mean of its divisors is an integer number (6430408488).

Almost surely, 2^66254442154 is an apocalyptic number.

66254442154 is a deficient number, since it is larger than the sum of its proper divisors (36632093654).

66254442154 is a wasteful number, since it uses less digits than its factorization.

66254442154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9655389.

The product of its digits is 921600, while the sum is 43.

The spelling of 66254442154 in words is "sixty-six billion, two hundred fifty-four million, four hundred forty-two thousand, one hundred fifty-four".