1655666645560 has 32 divisors (see below), whose sum is σ = 3772405022400. Its totient is φ = 653883534720.

The previous prime is 1655666645551. The next prime is 1655666645561. The reversal of 1655666645560 is 655466665561.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655666645561) 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 7 ways as a sum of consecutive naturals, for example, 261969411 + ... + 261975730.

It is an arithmetic number, because the mean of its divisors is an integer number (117887656950).

Almost surely, 2^{1655666645560} is an apocalyptic number.

1655666645560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1655666645560 is an abundant number, since it is smaller than the sum of its proper divisors (2116738376840).

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

1655666645560 is a wasteful number, since it uses less digits than its factorization.

1655666645560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523945231 (or 523945227 counting only the distinct ones).

The product of its (nonzero) digits is 116640000, while the sum is 61.

The spelling of 1655666645560 in words is "one trillion, six hundred fifty-five billion, six hundred sixty-six million, six hundred forty-five thousand, five hundred sixty".