16661062431634 has 16 divisors (see below), whose sum is σ = 25296156061848. Its totient is φ = 8229623830272.

The previous prime is 16661062431617. The next prime is 16661062431821. The reversal of 16661062431634 is 43613426016661.

It can be written as a sum of positive squares in 4 ways, for example, as 16584058956609 + 77003475025 = 4072353^2 + 277495^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153300327 + ... + 153408970.

Almost surely, 2^{16661062431634} is an apocalyptic number.

16661062431634 is a deficient number, since it is larger than the sum of its proper divisors (8635093630214).

16661062431634 is a wasteful number, since it uses less digits than its factorization.

16661062431634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306709629.

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 16661062431634 in words is "sixteen trillion, six hundred sixty-one billion, sixty-two million, four hundred thirty-one thousand, six hundred thirty-four".