1660245705 has 24 divisors (see below), whose sum is σ = 2904662592. Its totient is φ = 877186464.

The previous prime is 1660245701. The next prime is 1660245779. The reversal of 1660245705 is 5075420661.

It is a happy number.

1660245705 is a `hidden beast` number, since 1 + 6 + 60 + 24 + 570 + 5 = 666.

It is not a de Polignac number, because 1660245705 - 2² = 1660245701 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660245705.

It is not an unprimeable number, because it can be changed into a prime (1660245701) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 167589 + ... + 177218.

It is an arithmetic number, because the mean of its divisors is an integer number (121027608).

Almost surely, 2^1660245705 is an apocalyptic number.

1660245705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660245705 is a deficient number, since it is larger than the sum of its proper divisors (1244416887).

1660245705 is a wasteful number, since it uses less digits than its factorization.

1660245705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344925 (or 344922 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 1660245705 is about 40746.1127593787. The cubic root of 1660245705 is about 1184.1065636468.

The spelling of 1660245705 in words is "one billion, six hundred sixty million, two hundred forty-five thousand, seven hundred five".