20766766 has 8 divisors (see below), whose sum is σ = 31525704. Its totient is φ = 10258200.

The previous prime is 20766751. The next prime is 20766773. The reversal of 20766766 is 66766702.

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

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, 62385 + ... + 62716.

It is an arithmetic number, because the mean of its divisors is an integer number (3940713).

Almost surely, 2^20766766 is an apocalyptic number.

20766766 is a deficient number, since it is larger than the sum of its proper divisors (10758938).

20766766 is a wasteful number, since it uses less digits than its factorization.

20766766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125186.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 20766766 is about 4557.0567255631. The cubic root of 20766766 is about 274.8672240575.

The spelling of 20766766 in words is "twenty million, seven hundred sixty-six thousand, seven hundred sixty-six".