78065330 has 48 divisors (see below), whose sum is σ = 164303640. Its totient is φ = 26627328.

The previous prime is 78065311. The next prime is 78065341. The reversal of 78065330 is 3356087.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49688401 + 28376929 = 7049^2 + 5327^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153116 + ... + 153624.

Almost surely, 2^78065330 is an apocalyptic number.

78065330 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78065330 is an abundant number, since it is smaller than the sum of its proper divisors (86238310).

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

78065330 is a wasteful number, since it uses less digits than its factorization.

78065330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 78065330 is about 8835.4586751340. The cubic root of 78065330 is about 427.3851223994.

The spelling of 78065330 in words is "seventy-eight million, sixty-five thousand, three hundred thirty".