78669296687 has 8 divisors (see below), whose sum is σ = 79747078656. Its totient is φ = 77598676512.

The previous prime is 78669296647. The next prime is 78669296729.

It is a happy number.

78669296687 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78669296687 - 2²⁶ = 78602187823 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 (78669296647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768328 + ... + 1812269.

It is an arithmetic number, because the mean of its divisors is an integer number (9968384832).

Almost surely, 2^78669296687 is an apocalyptic number.

78669296687 is a deficient number, since it is larger than the sum of its proper divisors (1077781969).

78669296687 is a wasteful number, since it uses less digits than its factorization.

78669296687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580897.

The product of its digits is 658409472, while the sum is 74.

The spelling of 78669296687 in words is "seventy-eight billion, six hundred sixty-nine million, two hundred ninety-six thousand, six hundred eighty-seven".