66166247158 has 32 divisors (see below), whose sum is σ = 109479299328. Its totient is φ = 29740956000.

The previous prime is 66166247107. The next prime is 66166247221. The reversal of 66166247158 is 85174266166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1819591 + ... + 1855597.

It is an arithmetic number, because the mean of its divisors is an integer number (3421228104).

Almost surely, 2^66166247158 is an apocalyptic number.

66166247158 is a deficient number, since it is larger than the sum of its proper divisors (43313052170).

66166247158 is a wasteful number, since it uses less digits than its factorization.

66166247158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36948.

The product of its digits is 2903040, while the sum is 52.

The spelling of 66166247158 in words is "sixty-six billion, one hundred sixty-six million, two hundred forty-seven thousand, one hundred fifty-eight".