16661166345526 has 32 divisors (see below), whose sum is σ = 26426869539840. Its totient is φ = 7862140729344.

The previous prime is 16661166345479. The next prime is 16661166345529. The reversal of 16661166345526 is 62554366116661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661166345529) 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, 98691 + ... + 5773393.

It is an arithmetic number, because the mean of its divisors is an integer number (825839673120).

Almost surely, 2^{16661166345526} is an apocalyptic number.

16661166345526 is a deficient number, since it is larger than the sum of its proper divisors (9765703194314).

16661166345526 is a wasteful number, since it uses less digits than its factorization.

16661166345526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675580.

The product of its digits is 27993600, while the sum is 58.

The spelling of 16661166345526 in words is "sixteen trillion, six hundred sixty-one billion, one hundred sixty-six million, three hundred forty-five thousand, five hundred twenty-six".