74066015440 has 20 divisors (see below), whose sum is σ = 172203486084. Its totient is φ = 29626406144.

The previous prime is 74066015411. The next prime is 74066015449. The reversal of 74066015440 is 4451066047.

It can be written as a sum of positive squares in 2 ways, for example, as 39341929104 + 34724086336 = 198348^2 + 186344^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 74066015440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74066015449) 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 3 ways as a sum of consecutive naturals, for example, 462912517 + ... + 462912676.

Almost surely, 2^74066015440 is an apocalyptic number.

It is an amenable number.

74066015440 is an abundant number, since it is smaller than the sum of its proper divisors (98137470644).

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

74066015440 is a wasteful number, since it uses less digits than its factorization.

74066015440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925825206 (or 925825200 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 74066015440 in words is "seventy-four billion, sixty-six million, fifteen thousand, four hundred forty".