1622666620 has 48 divisors (see below), whose sum is σ = 3440556000. Its totient is φ = 642817280.

The previous prime is 1622666611. The next prime is 1622666623. The reversal of 1622666620 is 266662261.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1622666620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622666623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1462626 + ... + 1463734.

It is an arithmetic number, because the mean of its divisors is an integer number (71678250).

Almost surely, 2^1622666620 is an apocalyptic number.

1622666620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1622666620 is an abundant number, since it is smaller than the sum of its proper divisors (1817889380).

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

1622666620 is a wasteful number, since it uses less digits than its factorization.

1622666620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 1622666620 is about 40282.3363274773. The cubic root of 1622666620 is about 1175.1043504729.

The spelling of 1622666620 in words is "one billion, six hundred twenty-two million, six hundred sixty-six thousand, six hundred twenty".