1666315012 has 12 divisors (see below), whose sum is σ = 2927399580. Its totient is φ = 829915136.

The previous prime is 1666314997. The next prime is 1666315039. The reversal of 1666315012 is 2105136661.

It can be written as a sum of positive squares in 2 ways, for example, as 1656164416 + 10150596 = 40696^2 + 3186^2 .

It is a super-4 number, since 4×1666315012⁴ (a number of 38 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809437 + ... + 811492.

It is an arithmetic number, because the mean of its divisors is an integer number (243949965).

Almost surely, 2^1666315012 is an apocalyptic number.

It is an amenable number.

1666315012 is a deficient number, since it is larger than the sum of its proper divisors (1261084568).

1666315012 is a wasteful number, since it uses less digits than its factorization.

1666315012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621190 (or 1621188 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1666315012 is about 40820.5219466876. The cubic root of 1666315012 is about 1185.5477090894.

The spelling of 1666315012 in words is "one billion, six hundred sixty-six million, three hundred fifteen thousand, twelve".