78566885158103 has 4 divisors (see below), whose sum is σ = 78619508659368. Its totient is φ = 78514261656840.

The previous prime is 78566885158061. The next prime is 78566885158189. The reversal of 78566885158103 is 30185158866587.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78566885158103 - 2⁶ = 78566885158039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78566885158403) 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, 26311748393 + ... + 26311751378.

It is an arithmetic number, because the mean of its divisors is an integer number (19654877164842).

Almost surely, 2^{78566885158103} is an apocalyptic number.

78566885158103 is a deficient number, since it is larger than the sum of its proper divisors (52623501265).

78566885158103 is a wasteful number, since it uses less digits than its factorization.

78566885158103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52623501264.

The product of its (nonzero) digits is 387072000, while the sum is 71.

The spelling of 78566885158103 in words is "seventy-eight trillion, five hundred sixty-six billion, eight hundred eighty-five million, one hundred fifty-eight thousand, one hundred three".