166422065610661 has 64 divisors (see below), whose sum is σ = 202384987822080. Its totient is φ = 133799377582080.

The previous prime is 166422065610613. The next prime is 166422065610673. The reversal of 166422065610661 is 166016560224661.

It is not a de Polignac number, because 166422065610661 - 2⁹ = 166422065610149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166422065610599 and 166422065610608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166422065610061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17081188356 + ... + 17081198098.

It is an arithmetic number, because the mean of its divisors is an integer number (3162265434720).

Almost surely, 2^{166422065610661} is an apocalyptic number.

It is an amenable number.

166422065610661 is a deficient number, since it is larger than the sum of its proper divisors (35962922211419).

166422065610661 is a wasteful number, since it uses less digits than its factorization.

166422065610661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13094.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 166422065610661 in words is "one hundred sixty-six trillion, four hundred twenty-two billion, sixty-five million, six hundred ten thousand, six hundred sixty-one".