20662766 has 16 divisors (see below), whose sum is σ = 33043200. Its totient is φ = 9662328.

The previous prime is 20662757. The next prime is 20662787. The reversal of 20662766 is 66726602.

It is a congruent number.

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, 440 + ... + 6443.

It is an arithmetic number, because the mean of its divisors is an integer number (2065200).

Almost surely, 2^20662766 is an apocalyptic number.

20662766 is a deficient number, since it is larger than the sum of its proper divisors (12380434).

20662766 is a wasteful number, since it uses less digits than its factorization.

20662766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6983.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20662766 is about 4545.6315292817. The cubic root of 20662766 is about 274.4076107758.

The spelling of 20662766 in words is "twenty million, six hundred sixty-two thousand, seven hundred sixty-six".