660523071 has 8 divisors (see below), whose sum is σ = 948443440. Its totient is φ = 406475712.

The previous prime is 660523069. The next prime is 660523103. The reversal of 660523071 is 170325066.

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

It is not a de Polignac number, because 660523071 - 2¹ = 660523069 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 (660123071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8468206 + ... + 8468283.

It is an arithmetic number, because the mean of its divisors is an integer number (118555430).

Almost surely, 2^660523071 is an apocalyptic number.

660523071 is a deficient number, since it is larger than the sum of its proper divisors (287920369).

660523071 is a wasteful number, since it uses less digits than its factorization.

660523071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16936505.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 660523071 is about 25700.6433966156. The cubic root of 660523071 is about 870.8887166402. Note that the first 3 decimals are identical.

The spelling of 660523071 in words is "six hundred sixty million, five hundred twenty-three thousand, seventy-one".