66156265166 has 4 divisors (see below), whose sum is σ = 99234397752. Its totient is φ = 33078132582.

The previous prime is 66156265127. The next prime is 66156265171.

66156265166 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 16539066290 + ... + 16539066293.

It is an arithmetic number, because the mean of its divisors is an integer number (24808599438).

Almost surely, 2^66156265166 is an apocalyptic number.

66156265166 is a deficient number, since it is larger than the sum of its proper divisors (33078132586).

66156265166 is a wasteful number, since it uses less digits than its factorization.

66156265166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33078132585.

The product of its digits is 2332800, while the sum is 50.

The spelling of 66156265166 in words is "sixty-six billion, one hundred fifty-six million, two hundred sixty-five thousand, one hundred sixty-six".