78063660 has 144 divisors (see below), whose sum is σ = 254270016. Its totient is φ = 19316736.

The previous prime is 78063641. The next prime is 78063683. The reversal of 78063660 is 6636087.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 296689 + ... + 296951.

It is an arithmetic number, because the mean of its divisors is an integer number (1765764).

Almost surely, 2^78063660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78063660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127135008).

78063660 is an abundant number, since it is smaller than the sum of its proper divisors (176206356).

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

78063660 is a wasteful number, since it uses less digits than its factorization.

78063660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 78063660 is about 8835.3641690651. The cubic root of 78063660 is about 427.3820747886.

The spelling of 78063660 in words is "seventy-eight million, sixty-three thousand, six hundred sixty".