77620014663 has 4 divisors (see below), whose sum is σ = 103493352888. Its totient is φ = 51746676440.

The previous prime is 77620014629. The next prime is 77620014707. The reversal of 77620014663 is 36641002677.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36641002677 = 3 ⋅12213667559.

It is a cyclic number.

It is not a de Polignac number, because 77620014663 - 2²¹ = 77617917511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77620014623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12936669108 + ... + 12936669113.

It is an arithmetic number, because the mean of its divisors is an integer number (25873338222).

Almost surely, 2^77620014663 is an apocalyptic number.

77620014663 is a deficient number, since it is larger than the sum of its proper divisors (25873338225).

77620014663 is a wasteful number, since it uses less digits than its factorization.

77620014663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25873338224.

The product of its (nonzero) digits is 254016, while the sum is 42.

The spelling of 77620014663 in words is "seventy-seven billion, six hundred twenty million, fourteen thousand, six hundred sixty-three".