105421666456 has 8 divisors (see below), whose sum is σ = 197665624620. Its totient is φ = 52710833224.

The previous prime is 105421666447. The next prime is 105421666481. The reversal of 105421666456 is 654666124501.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×105421666456² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6588854146 + ... + 6588854161.

Almost surely, 2^105421666456 is an apocalyptic number.

It is an amenable number.

105421666456 is a deficient number, since it is larger than the sum of its proper divisors (92243958164).

105421666456 is a wasteful number, since it uses less digits than its factorization.

105421666456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13177708313 (or 13177708309 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 105421666456 in words is "one hundred five billion, four hundred twenty-one million, six hundred sixty-six thousand, four hundred fifty-six".