78326065 has 4 divisors (see below), whose sum is σ = 93991284. Its totient is φ = 62660848.

The previous prime is 78326029. The next prime is 78326159. The reversal of 78326065 is 56062387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56062387 = 1609 ⋅34843.

It can be written as a sum of positive squares in 2 ways, for example, as 13571856 + 64754209 = 3684^2 + 8047^2 .

It is a cyclic number.

It is not a de Polignac number, because 78326065 - 2⁷ = 78325937 is a prime.

It is a super-2 number, since 2×78326065² = 12269944916768450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7832602 + ... + 7832611.

It is an arithmetic number, because the mean of its divisors is an integer number (23497821).

Almost surely, 2^78326065 is an apocalyptic number.

It is an amenable number.

78326065 is a deficient number, since it is larger than the sum of its proper divisors (15665219).

78326065 is a wasteful number, since it uses less digits than its factorization.

78326065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15665218.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 78326065 is about 8850.2014101375. The cubic root of 78326065 is about 427.8604099038.

The spelling of 78326065 in words is "seventy-eight million, three hundred twenty-six thousand, sixty-five".