105666126646 has 4 divisors (see below), whose sum is σ = 158499189972. Its totient is φ = 52833063322.

The previous prime is 105666126611. The next prime is 105666126677. The reversal of 105666126646 is 646621666501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646621666501 = 3943 ⋅163992307.

It is a super-2 number, since 2×105666126646² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105666126646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26416531660 + ... + 26416531663.

It is an arithmetic number, because the mean of its divisors is an integer number (39624797493).

Almost surely, 2^105666126646 is an apocalyptic number.

105666126646 is a deficient number, since it is larger than the sum of its proper divisors (52833063326).

105666126646 is an equidigital number, since it uses as much as digits as its factorization.

105666126646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52833063325.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 105666126646 in words is "one hundred five billion, six hundred sixty-six million, one hundred twenty-six thousand, six hundred forty-six".