165140666 has 16 divisors (see below), whose sum is σ = 261144000. Its totient is φ = 78105888.

The previous prime is 165140663. The next prime is 165140693. The reversal of 165140666 is 666041561.

165140666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165140663) 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 7 ways as a sum of consecutive naturals, for example, 25310 + ... + 31158.

It is an arithmetic number, because the mean of its divisors is an integer number (16321500).

Almost surely, 2^165140666 is an apocalyptic number.

165140666 is a deficient number, since it is larger than the sum of its proper divisors (96003334).

165140666 is a wasteful number, since it uses less digits than its factorization.

165140666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6613.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 165140666 is about 12850.7068288091. The cubic root of 165140666 is about 548.6364747695.

The spelling of 165140666 in words is "one hundred sixty-five million, one hundred forty thousand, six hundred sixty-six".