66109340 has 24 divisors (see below), whose sum is σ = 151450992. Its totient is φ = 24039680.

The previous prime is 66109339. The next prime is 66109397. The reversal of 66109340 is 4390166.

66109340 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

66109340 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 150029 + ... + 150468.

It is an arithmetic number, because the mean of its divisors is an integer number (6310458).

Almost surely, 2^66109340 is an apocalyptic number.

It is an amenable number.

66109340 is an abundant number, since it is smaller than the sum of its proper divisors (85341652).

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

66109340 is a wasteful number, since it uses less digits than its factorization.

66109340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300517 (or 300515 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66109340 is about 8130.7650316560. The cubic root of 66109340 is about 404.3470451926.

The spelling of 66109340 in words is "sixty-six million, one hundred nine thousand, three hundred forty".