766722560 has 40 divisors (see below), whose sum is σ = 1838343276. Its totient is φ = 306688000.

The previous prime is 766722533. The next prime is 766722563. The reversal of 766722560 is 65227667.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 707985664 + 58736896 = 26608^2 + 7664^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (766722563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147191 + ... + 152310.

Almost surely, 2^766722560 is an apocalyptic number.

It is an amenable number.

766722560 is an abundant number, since it is smaller than the sum of its proper divisors (1071620716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

766722560 is an equidigital number, since it uses as much as digits as its factorization.

766722560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299524 (or 299508 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 766722560 is about 27689.7555063240. The cubic root of 766722560 is about 915.2633679044.

The spelling of 766722560 in words is "seven hundred sixty-six million, seven hundred twenty-two thousand, five hundred sixty".