20966942166 has 8 divisors (see below), whose sum is σ = 41933884344. Its totient is φ = 6988980720.

The previous prime is 20966942141. The next prime is 20966942177. The reversal of 20966942166 is 66124966902.

It is a happy number.

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

20966942166 is an admirable number.

It is a super-2 number, since 2×20966942166² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1747245175 + ... + 1747245186.

It is an arithmetic number, because the mean of its divisors is an integer number (5241735543).

Almost surely, 2^20966942166 is an apocalyptic number.

20966942166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20966942166 is a wasteful number, since it uses less digits than its factorization.

20966942166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3494490366.

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 20966942166 in words is "twenty billion, nine hundred sixty-six million, nine hundred forty-two thousand, one hundred sixty-six".