147661866 has 120 divisors (see below), whose sum is σ = 376962432. Its totient is φ = 43302600.

The previous prime is 147661861. The next prime is 147661873. The reversal of 147661866 is 668166741.

It is not an unprimeable number, because it can be changed into a prime (147661861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4763271 + ... + 4763301.

Almost surely, 2^147661866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 147661866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188481216).

147661866 is an abundant number, since it is smaller than the sum of its proper divisors (229300566).

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

147661866 is an frugal number, since it uses more digits than its factorization.

147661866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 47 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 147661866 is about 12151.6198920144. The cubic root of 147661866 is about 528.5541057943.

The spelling of 147661866 in words is "one hundred forty-seven million, six hundred sixty-one thousand, eight hundred sixty-six".