16660375456377 has 16 divisors (see below), whose sum is σ = 22221311777408. Its totient is φ = 11103178394880.

The previous prime is 16660375456321. The next prime is 16660375456391. The reversal of 16660375456377 is 77365457306661.

It is a happy number.

It is not a de Polignac number, because 16660375456377 - 2⁶ = 16660375456313 is a prime.

It is a super-2 number, since 2×16660375456377² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16660375456177) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 328109163 + ... + 328159935.

It is an arithmetic number, because the mean of its divisors is an integer number (1388831986088).

Almost surely, 2^{16660375456377} is an apocalyptic number.

It is an amenable number.

16660375456377 is a deficient number, since it is larger than the sum of its proper divisors (5560936321031).

16660375456377 is a wasteful number, since it uses less digits than its factorization.

16660375456377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85440.

The product of its (nonzero) digits is 400075200, while the sum is 66.

The spelling of 16660375456377 in words is "sixteen trillion, six hundred sixty billion, three hundred seventy-five million, four hundred fifty-six thousand, three hundred seventy-seven".