66620422 has 24 divisors (see below), whose sum is σ = 115630200. Its totient is φ = 28686240.

The previous prime is 66620419. The next prime is 66620423. The reversal of 66620422 is 22402666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66620423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2647 + ... + 11842.

It is an arithmetic number, because the mean of its divisors is an integer number (4817925).

Almost surely, 2^66620422 is an apocalyptic number.

66620422 is a deficient number, since it is larger than the sum of its proper divisors (49009778).

66620422 is a wasteful number, since it uses less digits than its factorization.

66620422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14532 (or 14521 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 66620422 is about 8162.1334220901. The cubic root of 66620422 is about 405.3863548832.

The spelling of 66620422 in words is "sixty-six million, six hundred twenty thousand, four hundred twenty-two".