76878565 has 8 divisors (see below), whose sum is σ = 95435640. Its totient is φ = 59381952.

The previous prime is 76878551. The next prime is 76878569. The reversal of 76878565 is 56587867.

It can be written as a sum of positive squares in 4 ways, for example, as 1136356 + 75742209 = 1066^2 + 8703^2 .

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 76878565 - 2¹⁷ = 76747493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76878569) 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, 264954 + ... + 265243.

It is an arithmetic number, because the mean of its divisors is an integer number (11929455).

Almost surely, 2^76878565 is an apocalyptic number.

It is an amenable number.

76878565 is a deficient number, since it is larger than the sum of its proper divisors (18557075).

76878565 is a wasteful number, since it uses less digits than its factorization.

76878565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530231.

The product of its digits is 2822400, while the sum is 52.

The square root of 76878565 is about 8768.0422558288. The cubic root of 76878565 is about 425.2083223221.

The spelling of 76878565 in words is "seventy-six million, eight hundred seventy-eight thousand, five hundred sixty-five".