106716667021 has 4 divisors (see below), whose sum is σ = 106772806044. Its totient is φ = 106660528000.

The previous prime is 106716666919. The next prime is 106716667087. The reversal of 106716667021 is 120766617601.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28557282121 + 78159384900 = 168989^2 + 279570^2 .

It is a cyclic number.

It is not a de Polignac number, because 106716667021 - 2¹¹ = 106716664973 is a prime.

It is a super-2 number, since 2×106716667021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106716662021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28066660 + ... + 28070461.

It is an arithmetic number, because the mean of its divisors is an integer number (26693201511).

Almost surely, 2^106716667021 is an apocalyptic number.

It is an amenable number.

106716667021 is a deficient number, since it is larger than the sum of its proper divisors (56139023).

106716667021 is an equidigital number, since it uses as much as digits as its factorization.

106716667021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56139022.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 106716667021 in words is "one hundred six billion, seven hundred sixteen million, six hundred sixty-seven thousand, twenty-one".