16661732055746 has 8 divisors (see below), whose sum is σ = 24992652328380. Its totient is φ = 8330847946288.

The previous prime is 16661732055743. The next prime is 16661732055821. The reversal of 16661732055746 is 64755023716661.

It can be written as a sum of positive squares in 2 ways, for example, as 16570688045521 + 91044010225 = 4070711^2 + 301735^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×16661732055746² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16661732055743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7858001 + ... + 9750468.

Almost surely, 2^{16661732055746} is an apocalyptic number.

16661732055746 is a deficient number, since it is larger than the sum of its proper divisors (8330920272634).

16661732055746 is a wasteful number, since it uses less digits than its factorization.

16661732055746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18081588.

The product of its (nonzero) digits is 38102400, while the sum is 59.

The spelling of 16661732055746 in words is "sixteen trillion, six hundred sixty-one billion, seven hundred thirty-two million, fifty-five thousand, seven hundred forty-six".