101667685085 has 4 divisors (see below), whose sum is σ = 122001222108. Its totient is φ = 81334148064.

The previous prime is 101667685081. The next prime is 101667685087. The reversal of 101667685085 is 580586766101.

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 48074509081 + 53593176004 = 219259^2 + 231502^2 .

It is a cyclic number.

It is not a de Polignac number, because 101667685085 - 2² = 101667685081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101667685081) 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, 10166768504 + ... + 10166768513.

It is an arithmetic number, because the mean of its divisors is an integer number (30500305527).

Almost surely, 2^101667685085 is an apocalyptic number.

It is an amenable number.

101667685085 is a deficient number, since it is larger than the sum of its proper divisors (20333537023).

101667685085 is an equidigital number, since it uses as much as digits as its factorization.

101667685085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20333537022.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 101667685085 in words is "one hundred one billion, six hundred sixty-seven million, six hundred eighty-five thousand, eighty-five".