101666843349 has 4 divisors (see below), whose sum is σ = 135555791136. Its totient is φ = 67777895564.

The previous prime is 101666843269. The next prime is 101666843357. The reversal of 101666843349 is 943348666101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101666843349 - 2¹³ = 101666835157 is a prime.

It is a super-2 number, since 2×101666843349² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101666843249) 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, 16944473889 + ... + 16944473894.

It is an arithmetic number, because the mean of its divisors is an integer number (33888947784).

Almost surely, 2^101666843349 is an apocalyptic number.

It is an amenable number.

101666843349 is a deficient number, since it is larger than the sum of its proper divisors (33888947787).

101666843349 is an equidigital number, since it uses as much as digits as its factorization.

101666843349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33888947786.

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 101666843349 in words is "one hundred one billion, six hundred sixty-six million, eight hundred forty-three thousand, three hundred forty-nine".