1661716276610 has 24 divisors (see below), whose sum is σ = 3238871846580. Its totient is φ = 613556778432.

The previous prime is 1661716276601. The next prime is 1661716276621. The reversal of 1661716276610 is 166726171661.

It can be written as a sum of positive squares in 6 ways, for example, as 14028270481 + 1647688006129 = 118441^2 + 1283623^2 .

It is a super-2 number, since 2×1661716276610² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 491630345 + ... + 491633724.

Almost surely, 2^{1661716276610} is an apocalyptic number.

1661716276610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661716276610 is a deficient number, since it is larger than the sum of its proper divisors (1577155569970).

1661716276610 is a wasteful number, since it uses less digits than its factorization.

1661716276610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983264102 (or 983264089 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 1661716276610 in words is "one trillion, six hundred sixty-one billion, seven hundred sixteen million, two hundred seventy-six thousand, six hundred ten".