42420660724 has 12 divisors (see below), whose sum is σ = 79946629924. Its totient is φ = 19578766464.

The previous prime is 42420660661. The next prime is 42420660727. The reversal of 42420660724 is 42706602424.

It can be written as a sum of positive squares in 2 ways, for example, as 2147395600 + 40273265124 = 46340^2 + 200682^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42420660727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407890917 + ... + 407891020.

Almost surely, 2^42420660724 is an apocalyptic number.

It is an amenable number.

42420660724 is a deficient number, since it is larger than the sum of its proper divisors (37525969200).

42420660724 is a wasteful number, since it uses less digits than its factorization.

42420660724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815781954 (or 815781952 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 37.

The spelling of 42420660724 in words is "forty-two billion, four hundred twenty million, six hundred sixty thousand, seven hundred twenty-four".