660166155 has 24 divisors (see below), whose sum is σ = 1248315120. Its totient is φ = 320080320.

The previous prime is 660166103. The next prime is 660166159. The reversal of 660166155 is 551661066.

660166155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660166155 - 2¹³ = 660157963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660166159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 666340 + ... + 667329.

It is an arithmetic number, because the mean of its divisors is an integer number (52013130).

Almost surely, 2^660166155 is an apocalyptic number.

660166155 is a deficient number, since it is larger than the sum of its proper divisors (588148965).

660166155 is a wasteful number, since it uses less digits than its factorization.

660166155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333691 (or 1333688 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 660166155 is about 25693.6987411311. The cubic root of 660166155 is about 870.7318257687.

The spelling of 660166155 in words is "six hundred sixty million, one hundred sixty-six thousand, one hundred fifty-five".