66706710440 has 32 divisors (see below), whose sum is σ = 150120643680. Its totient is φ = 26677253952.

The previous prime is 66706710437. The next prime is 66706710461. The reversal of 66706710440 is 4401760766.

It is a happy number.

66706710440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32279 + ... + 366681.

It is an arithmetic number, because the mean of its divisors is an integer number (4691270115).

Almost surely, 2^66706710440 is an apocalyptic number.

It is an amenable number.

66706710440 is an abundant number, since it is smaller than the sum of its proper divisors (83413933240).

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

66706710440 is a wasteful number, since it uses less digits than its factorization.

66706710440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339401 (or 339397 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 66706710440 in words is "sixty-six billion, seven hundred six million, seven hundred ten thousand, four hundred forty".