16740527661 has 80 divisors (see below), whose sum is σ = 29440147968. Its totient is φ = 9345974400.

The previous prime is 16740527599. The next prime is 16740527701. The reversal of 16740527661 is 16672504761.

16740527661 is a `hidden beast` number, since 1 + 67 + 4 + 0 + 527 + 6 + 61 = 666.

It is not a de Polignac number, because 16740527661 - 2¹⁵ = 16740494893 is a prime.

It is a super-2 number, since 2×16740527661² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16740527261) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7029691 + ... + 7032071.

Almost surely, 2^16740527661 is an apocalyptic number.

16740527661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16740527661 is a deficient number, since it is larger than the sum of its proper divisors (12699620307).

16740527661 is a wasteful number, since it uses less digits than its factorization.

16740527661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024 (or 3015 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 16740527661 in words is "sixteen billion, seven hundred forty million, five hundred twenty-seven thousand, six hundred sixty-one".