1505655666660 has 96 divisors (see below), whose sum is σ = 4255636936320. Its totient is φ = 397719548928.

The previous prime is 1505655666637. The next prime is 1505655666661. The reversal of 1505655666660 is 666665565051.

It is a self number, because there is not a number n which added to its sum of digits gives 1505655666660.

It is not an unprimeable number, because it can be changed into a prime (1505655666661) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 26504407 + ... + 26561153.

It is an arithmetic number, because the mean of its divisors is an integer number (44329551420).

Almost surely, 2^{1505655666660} is an apocalyptic number.

1505655666660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1505655666660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2127818468160).

1505655666660 is an abundant number, since it is smaller than the sum of its proper divisors (2749981269660).

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

1505655666660 is a wasteful number, since it uses less digits than its factorization.

1505655666660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60925 (or 60923 counting only the distinct ones).

The product of its (nonzero) digits is 29160000, while the sum is 57.

The spelling of 1505655666660 in words is "one trillion, five hundred five billion, six hundred fifty-five million, six hundred sixty-six thousand, six hundred sixty".