66161666562 has 32 divisors (see below), whose sum is σ = 138097630080. Its totient is φ = 21104966400.

The previous prime is 66161666537. The next prime is 66161666581. The reversal of 66161666562 is 26566616166.

66161666562 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66161666562² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1662814 + ... + 1702137.

It is an arithmetic number, because the mean of its divisors is an integer number (4315550940).

Almost surely, 2^66161666562 is an apocalyptic number.

66161666562 is an abundant number, since it is smaller than the sum of its proper divisors (71935963518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66161666562 is a wasteful number, since it uses less digits than its factorization.

66161666562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3365098.

The product of its digits is 2799360, while the sum is 51.

The spelling of 66161666562 in words is "sixty-six billion, one hundred sixty-one million, six hundred sixty-six thousand, five hundred sixty-two".