16661056001375 has 8 divisors (see below), whose sum is σ = 20792997889872. Its totient is φ = 13328844801000.

The previous prime is 16661056001329. The next prime is 16661056001407. The reversal of 16661056001375 is 57310065016661.

It is not a de Polignac number, because 16661056001375 - 2³² = 16656761034079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66644223881 + ... + 66644224130.

It is an arithmetic number, because the mean of its divisors is an integer number (2599124736234).

Almost surely, 2^{16661056001375} is an apocalyptic number.

16661056001375 is a deficient number, since it is larger than the sum of its proper divisors (4131941888497).

16661056001375 is an equidigital number, since it uses as much as digits as its factorization.

16661056001375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133288448026 (or 133288448016 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 16661056001375 in words is "sixteen trillion, six hundred sixty-one billion, fifty-six million, one thousand, three hundred seventy-five".