42666221240 has 64 divisors (see below), whose sum is σ = 101672055360. Its totient is φ = 16058460160.

The previous prime is 42666221233. The next prime is 42666221243. The reversal of 42666221240 is 4212266624.

It is a self number, because there is not a number n which added to its sum of digits gives 42666221240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42666221243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4519325 + ... + 4528755.

It is an arithmetic number, because the mean of its divisors is an integer number (1588625865).

Almost surely, 2^42666221240 is an apocalyptic number.

42666221240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42666221240 is an abundant number, since it is smaller than the sum of its proper divisors (59005834120).

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

42666221240 is a wasteful number, since it uses less digits than its factorization.

42666221240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16112 (or 16108 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 42666221240 its reverse (4212266624), we get a palindrome (46878487864).

The spelling of 42666221240 in words is "forty-two billion, six hundred sixty-six million, two hundred twenty-one thousand, two hundred forty".