77345661606 has 16 divisors (see below), whose sum is σ = 154698755904. Its totient is φ = 25780648424.

The previous prime is 77345661521. The next prime is 77345661637. The reversal of 77345661606 is 60616654377.

It is a happy number.

It is a congruent number.

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, 169536 + ... + 428291.

It is an arithmetic number, because the mean of its divisors is an integer number (9668672244).

Almost surely, 2^77345661606 is an apocalyptic number.

77345661606 is an abundant number, since it is smaller than the sum of its proper divisors (77353094298).

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

77345661606 is a wasteful number, since it uses less digits than its factorization.

77345661606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619395.

The product of its (nonzero) digits is 3810240, while the sum is 51.

The spelling of 77345661606 in words is "seventy-seven billion, three hundred forty-five million, six hundred sixty-one thousand, six hundred six".