78266266287 has 24 divisors (see below), whose sum is σ = 120741358080. Its totient is φ = 44937565200.

The previous prime is 78266266271. The next prime is 78266266303.

78266266287 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (78266266271) and next prime (78266266303).

It is not a de Polignac number, because 78266266287 - 2⁴ = 78266266271 is a prime.

It is a super-2 number, since 2×78266266287² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78266266287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78266266087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5667039 + ... + 5680832.

It is an arithmetic number, because the mean of its divisors is an integer number (5030889920).

Almost surely, 2^78266266287 is an apocalyptic number.

78266266287 is a deficient number, since it is larger than the sum of its proper divisors (42475091793).

78266266287 is a wasteful number, since it uses less digits than its factorization.

78266266287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11347915 (or 11347904 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 60.

The spelling of 78266266287 in words is "seventy-eight billion, two hundred sixty-six million, two hundred sixty-six thousand, two hundred eighty-seven".