105666061615 has 16 divisors (see below), whose sum is σ = 129916011456. Its totient is φ = 82455788800.

The previous prime is 105666061607. The next prime is 105666061637. The reversal of 105666061615 is 516160666501.

It is not a de Polignac number, because 105666061615 - 2³ = 105666061607 is a prime.

It is a super-2 number, since 2×105666061615² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1132014 + ... + 1221796.

It is an arithmetic number, because the mean of its divisors is an integer number (8119750716).

Almost surely, 2^105666061615 is an apocalyptic number.

105666061615 is a deficient number, since it is larger than the sum of its proper divisors (24249949841).

105666061615 is an equidigital number, since it uses as much as digits as its factorization.

105666061615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95570.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 105666061615 in words is "one hundred five billion, six hundred sixty-six million, sixty-one thousand, six hundred fifteen".