66150805166 has 4 divisors (see below), whose sum is σ = 99226207752. Its totient is φ = 33075402582.

The previous prime is 66150805141. The next prime is 66150805183.

66150805166 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×66150805166² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16537701290 + ... + 16537701293.

It is an arithmetic number, because the mean of its divisors is an integer number (24806551938).

Almost surely, 2^66150805166 is an apocalyptic number.

66150805166 is a deficient number, since it is larger than the sum of its proper divisors (33075402586).

66150805166 is a wasteful number, since it uses less digits than its factorization.

66150805166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33075402585.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 66150805166 in words is "sixty-six billion, one hundred fifty million, eight hundred five thousand, one hundred sixty-six".