78065998 has 8 divisors (see below), whose sum is σ = 120876480. Its totient is φ = 37773840.

The previous prime is 78065993. The next prime is 78066007. The reversal of 78065998 is 89956087.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78065993) 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 3 ways as a sum of consecutive naturals, for example, 629503 + ... + 629626.

It is an arithmetic number, because the mean of its divisors is an integer number (15109560).

Almost surely, 2^78065998 is an apocalyptic number.

78065998 is a deficient number, since it is larger than the sum of its proper divisors (42810482).

78065998 is a wasteful number, since it uses less digits than its factorization.

78065998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259162.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 78065998 is about 8835.4964772785. The cubic root of 78065998 is about 427.3863414316.

The spelling of 78065998 in words is "seventy-eight million, sixty-five thousand, nine hundred ninety-eight".