1666056760 has 16 divisors (see below), whose sum is σ = 3748627800. Its totient is φ = 666422688.

The previous prime is 1666056731. The next prime is 1666056779. The reversal of 1666056760 is 676506661.

It is a super-3 number, since 3×1666056760³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

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, 20825670 + ... + 20825749.

Almost surely, 2^1666056760 is an apocalyptic number.

1666056760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666056760 is an abundant number, since it is smaller than the sum of its proper divisors (2082571040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666056760 is a wasteful number, since it uses less digits than its factorization.

1666056760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41651430 (or 41651426 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 1666056760 is about 40817.3585622588. The cubic root of 1666056760 is about 1185.4864589890.

The spelling of 1666056760 in words is "one billion, six hundred sixty-six million, fifty-six thousand, seven hundred sixty".