76772565 has 12 divisors (see below), whose sum is σ = 133072524. Its totient is φ = 40945344.

The previous prime is 76772543. The next prime is 76772569. The reversal of 76772565 is 56527767.

It can be written as a sum of positive squares in 2 ways, for example, as 55621764 + 21150801 = 7458^2 + 4599^2 .

It is not a de Polignac number, because 76772565 - 2⁵ = 76772533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1706057 = 76772565 / (7 + 6 + 7 + 7 + 2 + 5 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 76772565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76772569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 852984 + ... + 853073.

It is an arithmetic number, because the mean of its divisors is an integer number (11089377).

Almost surely, 2^76772565 is an apocalyptic number.

It is an amenable number.

76772565 is a deficient number, since it is larger than the sum of its proper divisors (56299959).

76772565 is a wasteful number, since it uses less digits than its factorization.

76772565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706068 (or 1706065 counting only the distinct ones).

The product of its digits is 617400, while the sum is 45.

The square root of 76772565 is about 8761.9954918957. The cubic root of 76772565 is about 425.0128069958.

It can be divided in two parts, 76 and 772565, that added together give a square (772641 = 879²).

The spelling of 76772565 in words is "seventy-six million, seven hundred seventy-two thousand, five hundred sixty-five".