42220436661 has 96 divisors (see below), whose sum is σ = 68113543680. Its totient is φ = 25187760000.

The previous prime is 42220436633. The next prime is 42220436669. The reversal of 42220436661 is 16663402224.

42220436661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42220436661 - 2⁹ = 42220436149 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42220436669) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 168208786 + ... + 168209036.

It is an arithmetic number, because the mean of its divisors is an integer number (709516080).

Almost surely, 2^42220436661 is an apocalyptic number.

It is an amenable number.

42220436661 is a deficient number, since it is larger than the sum of its proper divisors (25893107019).

42220436661 is a wasteful number, since it uses less digits than its factorization.

42220436661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

Adding to 42220436661 its reverse (16663402224), we get a palindrome (58883838885).

The spelling of 42220436661 in words is "forty-two billion, two hundred twenty million, four hundred thirty-six thousand, six hundred sixty-one".