1662692656881 has 16 divisors (see below), whose sum is σ = 2228545828224. Its totient is φ = 1102662242304.

The previous prime is 1662692656879. The next prime is 1662692656939. The reversal of 1662692656881 is 1886562962661.

It is not a de Polignac number, because 1662692656881 - 2¹ = 1662692656879 is a prime.

It is a super-2 number, since 2×1662692656881² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1662692656811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 878386 + ... + 2024091.

It is an arithmetic number, because the mean of its divisors is an integer number (139284114264).

Almost surely, 2^{1662692656881} is an apocalyptic number.

It is an amenable number.

1662692656881 is a deficient number, since it is larger than the sum of its proper divisors (565853171343).

1662692656881 is a wasteful number, since it uses less digits than its factorization.

1662692656881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903480.

The product of its digits is 89579520, while the sum is 66.

The spelling of 1662692656881 in words is "one trillion, six hundred sixty-two billion, six hundred ninety-two million, six hundred fifty-six thousand, eight hundred eighty-one".