1651661066880 has 192 divisors, whose sum is σ = 6221882553120. Its totient is φ = 400402667520.

The previous prime is 1651661066849. The next prime is 1651661066953. The reversal of 1651661066880 is 886601661561.

1651661066880 is a `hidden beast` number, since 1 + 6 + 5 + 16 + 610 + 6 + 6 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12970582 + ... + 13097301.

Almost surely, 2^{1651661066880} is an apocalyptic number.

1651661066880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1651661066880 is an abundant number, since it is smaller than the sum of its proper divisors (4570221486240).

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

1651661066880 is a wasteful number, since it uses less digits than its factorization.

1651661066880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26067919 (or 26067904 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 1651661066880 in words is "one trillion, six hundred fifty-one billion, six hundred sixty-one million, sixty-six thousand, eight hundred eighty".