660852823 has 4 divisors (see below), whose sum is σ = 682170688. Its totient is φ = 639534960.

The previous prime is 660852821. The next prime is 660852869. The reversal of 660852823 is 328258066.

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

It is not a de Polignac number, because 660852823 - 2¹ = 660852821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660852821) 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, 10658886 + ... + 10658947.

It is an arithmetic number, because the mean of its divisors is an integer number (170542672).

Almost surely, 2^660852823 is an apocalyptic number.

660852823 is a deficient number, since it is larger than the sum of its proper divisors (21317865).

660852823 is a wasteful number, since it uses less digits than its factorization.

660852823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21317864.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 660852823 is about 25707.0578441019. The cubic root of 660852823 is about 871.0336167116.

The spelling of 660852823 in words is "six hundred sixty million, eight hundred fifty-two thousand, eight hundred twenty-three".