16661667254755 has 4 divisors (see below), whose sum is σ = 19994000705712. Its totient is φ = 13329333803800.

The previous prime is 16661667254711. The next prime is 16661667254767. The reversal of 16661667254755 is 55745276616661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16661667254755 - 2¹¹ = 16661667252707 is a prime.

It is a super-2 number, since 2×16661667254755² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666166725471 + ... + 1666166725480.

It is an arithmetic number, because the mean of its divisors is an integer number (4998500176428).

Almost surely, 2^{16661667254755} is an apocalyptic number.

16661667254755 is a deficient number, since it is larger than the sum of its proper divisors (3332333450957).

16661667254755 is an equidigital number, since it uses as much as digits as its factorization.

16661667254755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332333450956.

The product of its digits is 381024000, while the sum is 67.

The spelling of 16661667254755 in words is "sixteen trillion, six hundred sixty-one billion, six hundred sixty-seven million, two hundred fifty-four thousand, seven hundred fifty-five".