4020622661 has 32 divisors (see below), whose sum is σ = 4731678720. Its totient is φ = 3377246400.

The previous prime is 4020622657. The next prime is 4020622681. The reversal of 4020622661 is 1662260204.

It is not a de Polignac number, because 4020622661 - 2² = 4020622657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020622651) 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 31 ways as a sum of consecutive naturals, for example, 3899216 + ... + 3900246.

It is an arithmetic number, because the mean of its divisors is an integer number (147864960).

Almost surely, 2^4020622661 is an apocalyptic number.

It is an amenable number.

4020622661 is a deficient number, since it is larger than the sum of its proper divisors (711056059).

4020622661 is a wasteful number, since it uses less digits than its factorization.

4020622661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 4020622661 is about 63408.3800534283. The cubic root of 4020622661 is about 1590.1244132174.

Adding to 4020622661 its reverse (1662260204), we get a palindrome (5682882865).

The spelling of 4020622661 in words is "four billion, twenty million, six hundred twenty-two thousand, six hundred sixty-one".