1664622 has 12 divisors (see below), whose sum is σ = 3606720. Its totient is φ = 554868.

The previous prime is 1664569. The next prime is 1664627. The reversal of 1664622 is 2264661.

It is a happy number.

1664622 is a `hidden beast` number, since 16 + 646 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46222 + ... + 46257.

It is an arithmetic number, because the mean of its divisors is an integer number (300560).

2^1664622 is an apocalyptic number.

1664622 is an abundant number, since it is smaller than the sum of its proper divisors (1942098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664622 is a wasteful number, since it uses less digits than its factorization.

1664622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92487 (or 92484 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1664622 is about 1290.2023097174. The cubic root of 1664622 is about 118.5146059014.

It can be divided in two parts, 166462 and 2, that added together give a square (166464 = 408²).

The spelling of 1664622 in words is "one million, six hundred sixty-four thousand, six hundred twenty-two".