1660650516550 has 24 divisors (see below), whose sum is σ = 3089549829816. Its totient is φ = 664101095040.

The previous prime is 1660650516509. The next prime is 1660650516559. The reversal of 1660650516550 is 556150560661.

It is a self number, because there is not a number n which added to its sum of digits gives 1660650516550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660650516559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3766852 + ... + 4184551.

It is an arithmetic number, because the mean of its divisors is an integer number (128731242909).

Almost surely, 2^{1660650516550} is an apocalyptic number.

1660650516550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1660650516550 is a deficient number, since it is larger than the sum of its proper divisors (1428899313266).

1660650516550 is a wasteful number, since it uses less digits than its factorization.

1660650516550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955592 (or 7955587 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 1660650516550 in words is "one trillion, six hundred sixty billion, six hundred fifty million, five hundred sixteen thousand, five hundred fifty".