66162618 has 24 divisors (see below), whose sum is σ = 147977856. Its totient is φ = 21342600.

The previous prime is 66162611. The next prime is 66162641. The reversal of 66162618 is 81626166.

66162618 is a `hidden beast` number, since 6 + 616 + 26 + 18 = 666.

It is a super-2 number, since 2×66162618² = 8754984041227848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66162611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58728 + ... + 59843.

It is an arithmetic number, because the mean of its divisors is an integer number (6165744).

Almost surely, 2^66162618 is an apocalyptic number.

66162618 is an abundant number, since it is smaller than the sum of its proper divisors (81815238).

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

66162618 is a wasteful number, since it uses less digits than its factorization.

66162618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118610 (or 118607 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 66162618 is about 8134.0406932840. The cubic root of 66162618 is about 404.4556381050.

The spelling of 66162618 in words is "sixty-six million, one hundred sixty-two thousand, six hundred eighteen".