426665221260 has 24 divisors (see below), whose sum is σ = 1194662619696. Its totient is φ = 113777392320.

The previous prime is 426665221259. The next prime is 426665221261. The reversal of 426665221260 is 62122566624.

426665221260 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (426665221259) and next prime (426665221261).

It is a super-2 number, since 2×426665221260² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (426665221261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3555543451 + ... + 3555543570.

It is an arithmetic number, because the mean of its divisors is an integer number (49777609154).

Almost surely, 2^426665221260 is an apocalyptic number.

It is an amenable number.

426665221260 is an abundant number, since it is smaller than the sum of its proper divisors (767997398436).

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

426665221260 is a wasteful number, since it uses less digits than its factorization.

426665221260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111087033 (or 7111087031 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

Adding to 426665221260 its reverse (62122566624), we get a palindrome (488787787884).

The spelling of 426665221260 in words is "four hundred twenty-six billion, six hundred sixty-five million, two hundred twenty-one thousand, two hundred sixty".