78772765 has 8 divisors (see below), whose sum is σ = 99502560. Its totient is φ = 59701392.

The previous prime is 78772763. The next prime is 78772783. The reversal of 78772765 is 56727787.

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 78772765 - 2¹ = 78772763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78772763) 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, 414499 + ... + 414688.

It is an arithmetic number, because the mean of its divisors is an integer number (12437820).

Almost surely, 2^78772765 is an apocalyptic number.

It is an amenable number.

78772765 is a deficient number, since it is larger than the sum of its proper divisors (20729795).

78772765 is a wasteful number, since it uses less digits than its factorization.

78772765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829211.

The product of its digits is 1152480, while the sum is 49.

The square root of 78772765 is about 8875.4022444056. The cubic root of 78772765 is about 428.6722429234.

The spelling of 78772765 in words is "seventy-eight million, seven hundred seventy-two thousand, seven hundred sixty-five".