20766165925 has 12 divisors (see below), whose sum is σ = 26134376896. Its totient is φ = 16364977200.

The previous prime is 20766165911. The next prime is 20766165943. The reversal of 20766165925 is 52956166702.

It is not a de Polignac number, because 20766165925 - 2¹¹ = 20766163877 is a prime.

It is a super-2 number, since 2×20766165925² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 6197181 + ... + 6200530.

Almost surely, 2^20766165925 is an apocalyptic number.

20766165925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20766165925 is a deficient number, since it is larger than the sum of its proper divisors (5368210971).

20766165925 is a wasteful number, since it uses less digits than its factorization.

20766165925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12397788 (or 12397783 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 20766165925 in words is "twenty billion, seven hundred sixty-six million, one hundred sixty-five thousand, nine hundred twenty-five".