1666116610 has 16 divisors (see below), whose sum is σ = 3002035896. Its totient is φ = 665774208.

The previous prime is 1666116587. The next prime is 1666116679. The reversal of 1666116610 is 166116661.

It can be written as a sum of positive squares in 4 ways, for example, as 1473101161 + 193015449 = 38381^2 + 13893^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73587 + ... + 93526.

Almost surely, 2^1666116610 is an apocalyptic number.

1666116610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666116610 is a deficient number, since it is larger than the sum of its proper divisors (1335919286).

1666116610 is a wasteful number, since it uses less digits than its factorization.

1666116610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168117.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1666116610 is about 40818.0916996373. The cubic root of 1666116610 is about 1185.5006542866.

The spelling of 1666116610 in words is "one billion, six hundred sixty-six million, one hundred sixteen thousand, six hundred ten".