1666552613630 has 32 divisors (see below), whose sum is σ = 3117344659200. Its totient is φ = 640787477760.

The previous prime is 1666552613623. The next prime is 1666552613651. The reversal of 1666552613630 is 363162556661.

It is a super-2 number, since 2×1666552613630² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17993999 + ... + 18086378.

It is an arithmetic number, because the mean of its divisors is an integer number (97417020600).

Almost surely, 2^{1666552613630} is an apocalyptic number.

1666552613630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666552613630 is a deficient number, since it is larger than the sum of its proper divisors (1450792045570).

1666552613630 is a wasteful number, since it uses less digits than its factorization.

1666552613630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36080564.

The product of its (nonzero) digits is 3499200, while the sum is 50.

The spelling of 1666552613630 in words is "one trillion, six hundred sixty-six billion, five hundred fifty-two million, six hundred thirteen thousand, six hundred thirty".