766720365 has 32 divisors (see below), whose sum is σ = 1271808000. Its totient is φ = 394013760.

The previous prime is 766720351. The next prime is 766720369. The reversal of 766720365 is 563027667.

It is not a de Polignac number, because 766720365 - 2⁷ = 766720237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766720369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107686 + ... + 114584.

It is an arithmetic number, because the mean of its divisors is an integer number (39744000).

Almost surely, 2^766720365 is an apocalyptic number.

It is an amenable number.

766720365 is a deficient number, since it is larger than the sum of its proper divisors (505087635).

766720365 is a wasteful number, since it uses less digits than its factorization.

766720365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7177.

The product of its (nonzero) digits is 317520, while the sum is 42.

The square root of 766720365 is about 27689.7158706983. The cubic root of 766720365 is about 915.2624944876.

The spelling of 766720365 in words is "seven hundred sixty-six million, seven hundred twenty thousand, three hundred sixty-five".