20254406666 has 16 divisors (see below), whose sum is σ = 32721905664. Its totient is φ = 9347259504.

The previous prime is 20254406629. The next prime is 20254406677. The reversal of 20254406666 is 66660445202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276755 + ... + 342201.

It is an arithmetic number, because the mean of its divisors is an integer number (2045119104).

Almost surely, 2^20254406666 is an apocalyptic number.

20254406666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20254406666 is a deficient number, since it is larger than the sum of its proper divisors (12467498998).

20254406666 is a wasteful number, since it uses less digits than its factorization.

20254406666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77365.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 20254406666 in words is "twenty billion, two hundred fifty-four million, four hundred six thousand, six hundred sixty-six".