1660011556656 has 40 divisors (see below), whose sum is σ = 4298597997120. Its totient is φ = 552016565056.

The previous prime is 1660011556649. The next prime is 1660011556703. The reversal of 1660011556656 is 6566551100661.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 41249070 + ... + 41289293.

It is an arithmetic number, because the mean of its divisors is an integer number (107464949928).

Almost surely, 2^{1660011556656} is an apocalyptic number.

1660011556656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1660011556656 is an abundant number, since it is smaller than the sum of its proper divisors (2638586440464).

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

1660011556656 is a wasteful number, since it uses less digits than its factorization.

1660011556656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82538793 (or 82538787 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 1660011556656 in words is "one trillion, six hundred sixty billion, eleven million, five hundred fifty-six thousand, six hundred fifty-six".