16661723143075 has 48 divisors (see below), whose sum is σ = 21507495860736. Its totient is φ = 12794116233600.

The previous prime is 16661723143067. The next prime is 16661723143097. The reversal of 16661723143075 is 57034132716661.

It is not a de Polignac number, because 16661723143075 - 2³ = 16661723143067 is a prime.

It is a super-2 number, since 2×16661723143075² (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 47 ways as a sum of consecutive naturals, for example, 147597604 + ... + 147710446.

It is an arithmetic number, because the mean of its divisors is an integer number (448072830432).

Almost surely, 2^{16661723143075} is an apocalyptic number.

16661723143075 is a deficient number, since it is larger than the sum of its proper divisors (4845772717661).

16661723143075 is a wasteful number, since it uses less digits than its factorization.

16661723143075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115324 (or 115319 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 16661723143075 in words is "sixteen trillion, six hundred sixty-one billion, seven hundred twenty-three million, one hundred forty-three thousand, seventy-five".