166100455504666 has 8 divisors (see below), whose sum is σ = 257742086128020. Its totient is φ = 80186426795328.

The previous prime is 166100455504631. The next prime is 166100455504721. The reversal of 166100455504666 is 666405554001661.

It can be written as a sum of positive squares in 2 ways, for example, as 161775632001025 + 4324823503641 = 12719105^2 + 2079621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×166100455504666² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1431900478431 + ... + 1431900478546.

Almost surely, 2^{166100455504666} is an apocalyptic number.

166100455504666 is a deficient number, since it is larger than the sum of its proper divisors (91641630623354).

166100455504666 is a wasteful number, since it uses less digits than its factorization.

166100455504666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863800957008.

The product of its (nonzero) digits is 15552000, while the sum is 55.

The spelling of 166100455504666 in words is "one hundred sixty-six trillion, one hundred billion, four hundred fifty-five million, five hundred four thousand, six hundred sixty-six".