66958787442 has 16 divisors (see below), whose sum is σ = 134939848032. Its totient is φ = 22149216960.

The previous prime is 66958787419. The next prime is 66958787443. The reversal of 66958787442 is 24478785966.

It is a happy number.

66958787442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66958787443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42593863 + ... + 42595434.

It is an arithmetic number, because the mean of its divisors is an integer number (8433740502).

Almost surely, 2^66958787442 is an apocalyptic number.

66958787442 is an abundant number, since it is smaller than the sum of its proper divisors (67981060590).

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

66958787442 is a wasteful number, since it uses less digits than its factorization.

66958787442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85189433.

The product of its digits is 162570240, while the sum is 66.

The spelling of 66958787442 in words is "sixty-six billion, nine hundred fifty-eight million, seven hundred eighty-seven thousand, four hundred forty-two".