77678065 has 8 divisors (see below), whose sum is σ = 93885120. Its totient is φ = 61694832.

The previous prime is 77678063. The next prime is 77678089. The reversal of 77678065 is 56087677.

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

It is a cyclic number.

It is not a de Polignac number, because 77678065 - 2¹ = 77678063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77678063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55189 + ... + 56578.

It is an arithmetic number, because the mean of its divisors is an integer number (11735640).

Almost surely, 2^77678065 is an apocalyptic number.

It is an amenable number.

77678065 is a deficient number, since it is larger than the sum of its proper divisors (16207055).

77678065 is a wasteful number, since it uses less digits than its factorization.

77678065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111911.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 77678065 is about 8813.5160407184. The cubic root of 77678065 is about 426.6772292171.

The spelling of 77678065 in words is "seventy-seven million, six hundred seventy-eight thousand, sixty-five".