78766466787 has 12 divisors (see below), whose sum is σ = 113848508904. Its totient is φ = 52476490080.

The previous prime is 78766466761. The next prime is 78766466797.

78766466787 is a `hidden beast` number, since 7 + 87 + 6 + 6 + 466 + 7 + 87 = 666.

78766466787 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78766466787 - 2⁸ = 78766466531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78766466797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2859514 + ... + 2886927.

It is an arithmetic number, because the mean of its divisors is an integer number (9487375742).

Almost surely, 2^78766466787 is an apocalyptic number.

78766466787 is a deficient number, since it is larger than the sum of its proper divisors (35082042117).

78766466787 is a wasteful number, since it uses less digits than its factorization.

78766466787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747970 (or 5747967 counting only the distinct ones).

The product of its digits is 796594176, while the sum is 72.

The spelling of 78766466787 in words is "seventy-eight billion, seven hundred sixty-six million, four hundred sixty-six thousand, seven hundred eighty-seven".