166916683443 has 4 divisors (see below), whose sum is σ = 222555577928. Its totient is φ = 111277788960.

The previous prime is 166916683441. The next prime is 166916683489. The reversal of 166916683443 is 344386619661.

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

It is not a de Polignac number, because 166916683443 - 2¹ = 166916683441 is a prime.

It is a super-2 number, since 2×166916683443² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166916683441) 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, 27819447238 + ... + 27819447243.

It is an arithmetic number, because the mean of its divisors is an integer number (55638894482).

Almost surely, 2^166916683443 is an apocalyptic number.

166916683443 is a deficient number, since it is larger than the sum of its proper divisors (55638894485).

166916683443 is an equidigital number, since it uses as much as digits as its factorization.

166916683443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55638894484.

The product of its digits is 13436928, while the sum is 57.

The spelling of 166916683443 in words is "one hundred sixty-six billion, nine hundred sixteen million, six hundred eighty-three thousand, four hundred forty-three".