660794143 has 4 divisors (see below), whose sum is σ = 662595040. Its totient is φ = 658993248.

The previous prime is 660794119. The next prime is 660794149. The reversal of 660794143 is 341497066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 660794143 - 2⁹ = 660793631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660794096 and 660794105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660794149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 899898 + ... + 900631.

It is an arithmetic number, because the mean of its divisors is an integer number (165648760).

Almost surely, 2^660794143 is an apocalyptic number.

660794143 is a deficient number, since it is larger than the sum of its proper divisors (1800897).

660794143 is a wasteful number, since it uses less digits than its factorization.

660794143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800896.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 660794143 is about 25705.9164979582. The cubic root of 660794143 is about 871.0078349925.

The spelling of 660794143 in words is "six hundred sixty million, seven hundred ninety-four thousand, one hundred forty-three".