78676751 has 4 divisors (see below), whose sum is σ = 80161272. Its totient is φ = 77192232.

The previous prime is 78676747. The next prime is 78676753. The reversal of 78676751 is 15767687.

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 78676751 - 2² = 78676747 is a prime.

It is a super-2 number, since 2×78676751² = 12380062295832002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78676696 and 78676705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78676753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742181 + ... + 742286.

It is an arithmetic number, because the mean of its divisors is an integer number (20040318).

Almost surely, 2^78676751 is an apocalyptic number.

78676751 is a deficient number, since it is larger than the sum of its proper divisors (1484521).

78676751 is a wasteful number, since it uses less digits than its factorization.

78676751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484520.

The product of its digits is 493920, while the sum is 47.

The square root of 78676751 is about 8869.9916008979. The cubic root of 78676751 is about 428.4980064327.

The spelling of 78676751 in words is "seventy-eight million, six hundred seventy-six thousand, seven hundred fifty-one".