20616671766 has 16 divisors (see below), whose sum is σ = 43658834544. Its totient is φ = 6467975424.

The previous prime is 20616671743. The next prime is 20616671797. The reversal of 20616671766 is 66717661602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101062015 + ... + 101062218.

It is an arithmetic number, because the mean of its divisors is an integer number (2728677159).

Almost surely, 2^20616671766 is an apocalyptic number.

20616671766 is an abundant number, since it is smaller than the sum of its proper divisors (23042162778).

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

20616671766 is a wasteful number, since it uses less digits than its factorization.

20616671766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202124255.

The product of its (nonzero) digits is 762048, while the sum is 48.

The spelling of 20616671766 in words is "twenty billion, six hundred sixteen million, six hundred seventy-one thousand, seven hundred sixty-six".