660163655 has 8 divisors (see below), whose sum is σ = 805183584. Its totient is φ = 519472800.

The previous prime is 660163643. The next prime is 660163717. The reversal of 660163655 is 556361066.

660163655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 660163655 - 2¹² = 660159559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081931 + ... + 1082540.

It is an arithmetic number, because the mean of its divisors is an integer number (100647948).

Almost surely, 2^660163655 is an apocalyptic number.

660163655 is a deficient number, since it is larger than the sum of its proper divisors (145019929).

660163655 is a wasteful number, since it uses less digits than its factorization.

660163655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164537.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 660163655 is about 25693.6500910244. The cubic root of 660163655 is about 870.7307266352.

The spelling of 660163655 in words is "six hundred sixty million, one hundred sixty-three thousand, six hundred fifty-five".