78007668 has 24 divisors (see below), whose sum is σ = 183787968. Its totient is φ = 25749696.

The previous prime is 78007661. The next prime is 78007669. The reversal of 78007668 is 86670087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78007661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30321 + ... + 32792.

It is an arithmetic number, because the mean of its divisors is an integer number (7657832).

Almost surely, 2^78007668 is an apocalyptic number.

It is an amenable number.

78007668 is an abundant number, since it is smaller than the sum of its proper divisors (105780300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78007668 is a wasteful number, since it uses less digits than its factorization.

78007668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63223 (or 63221 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 78007668 is about 8832.1949706741. The cubic root of 78007668 is about 427.2798688848.

The spelling of 78007668 in words is "seventy-eight million, seven thousand, six hundred sixty-eight".