660271143 has 64 divisors (see below), whose sum is σ = 1124444160. Its totient is φ = 335757312.

The previous prime is 660271121. The next prime is 660271151. The reversal of 660271143 is 341172066.

It is not a de Polignac number, because 660271143 - 2⁸ = 660270887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660271143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660271163) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 796053 + ... + 796881.

It is an arithmetic number, because the mean of its divisors is an integer number (17569440).

Almost surely, 2^660271143 is an apocalyptic number.

660271143 is a deficient number, since it is larger than the sum of its proper divisors (464173017).

660271143 is a wasteful number, since it uses less digits than its factorization.

660271143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 660271143 is about 25695.7417289324. The cubic root of 660271143 is about 870.7779815971. Note that the first 3 decimals are identical.

The spelling of 660271143 in words is "six hundred sixty million, two hundred seventy-one thousand, one hundred forty-three".