42066440451 has 80 divisors (see below), whose sum is σ = 74205981696. Its totient is φ = 23246305344.

The previous prime is 42066440443. The next prime is 42066440461. The reversal of 42066440451 is 15404466024.

42066440451 is a `hidden beast` number, since 4 + 2 + 0 + 6 + 644 + 0 + 4 + 5 + 1 = 666.

42066440451 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 42066440451 - 2³ = 42066440443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42066440461) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3497490 + ... + 3509496.

Almost surely, 2^42066440451 is an apocalyptic number.

42066440451 is a deficient number, since it is larger than the sum of its proper divisors (32139541245).

42066440451 is a wasteful number, since it uses less digits than its factorization.

42066440451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12230 (or 12221 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 42066440451 in words is "forty-two billion, sixty-six million, four hundred forty thousand, four hundred fifty-one".