20625166166 has 32 divisors (see below), whose sum is σ = 34313738400. Its totient is φ = 9219808000.

The previous prime is 20625166157. The next prime is 20625166169. The reversal of 20625166166 is 66166152602.

It is a super-2 number, since 2×20625166166² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625166169) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 299930 + ... + 362226.

It is an arithmetic number, because the mean of its divisors is an integer number (1072304325).

Almost surely, 2^20625166166 is an apocalyptic number.

20625166166 is a deficient number, since it is larger than the sum of its proper divisors (13688572234).

20625166166 is a wasteful number, since it uses less digits than its factorization.

20625166166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62560.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 20625166166 in words is "twenty billion, six hundred twenty-five million, one hundred sixty-six thousand, one hundred sixty-six".