660040845 has 32 divisors (see below), whose sum is σ = 1066684032. Its totient is φ = 348502272.

The previous prime is 660040831. The next prime is 660040873. The reversal of 660040845 is 548040066.

It is a happy number.

It is not a de Polignac number, because 660040845 - 2¹² = 660036749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 900099 + ... + 900831.

It is an arithmetic number, because the mean of its divisors is an integer number (33333876).

Almost surely, 2^660040845 is an apocalyptic number.

It is an amenable number.

660040845 is a deficient number, since it is larger than the sum of its proper divisors (406643187).

660040845 is a wasteful number, since it uses less digits than its factorization.

660040845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 660040845 is about 25691.2600897659. The cubic root of 660040845 is about 870.6767293819.

The spelling of 660040845 in words is "six hundred sixty million, forty thousand, eight hundred forty-five".