106651701521657 has 4 divisors (see below), whose sum is σ = 106651722652020. Its totient is φ = 106651680391296.

The previous prime is 106651701521639. The next prime is 106651701521683. The reversal of 106651701521657 is 756125107156601.

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 624398655721 + 106027302865936 = 790189^2 + 10296956^2 .

It is a cyclic number.

It is not a de Polignac number, because 106651701521657 - 2⁸ = 106651701521401 is a prime.

It is a super-2 number, since 2×106651701521657² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 106651701521599 and 106651701521608.

It is not an unprimeable number, because it can be changed into a prime (106651701521957) 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, 1938113 + ... + 14732945.

It is an arithmetic number, because the mean of its divisors is an integer number (26662930663005).

Almost surely, 2^{106651701521657} is an apocalyptic number.

It is an amenable number.

106651701521657 is a deficient number, since it is larger than the sum of its proper divisors (21130363).

106651701521657 is an equidigital number, since it uses as much as digits as its factorization.

106651701521657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21130362.

The product of its (nonzero) digits is 2646000, while the sum is 53.

The spelling of 106651701521657 in words is "one hundred six trillion, six hundred fifty-one billion, seven hundred one million, five hundred twenty-one thousand, six hundred fifty-seven".