1021660055660 has 24 divisors (see below), whose sum is σ = 2238768122976. Its totient is φ = 390896021120.

The previous prime is 1021660055629. The next prime is 1021660055707. The reversal of 1021660055660 is 665500661201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110499601 + ... + 1110500520.

It is an arithmetic number, because the mean of its divisors is an integer number (93282005124).

Almost surely, 2^{1021660055660} is an apocalyptic number.

1021660055660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021660055660 is an abundant number, since it is smaller than the sum of its proper divisors (1217108067316).

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

1021660055660 is a wasteful number, since it uses less digits than its factorization.

1021660055660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221000153 (or 2221000151 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 1021660055660 in words is "one trillion, twenty-one billion, six hundred sixty million, fifty-five thousand, six hundred sixty".