660320773 has 4 divisors (see below), whose sum is σ = 754652320. Its totient is φ = 565989228.

The previous prime is 660320753. The next prime is 660320809. The reversal of 660320773 is 377023066.

It is a happy number.

660320773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-660320773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660320723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47165763 + ... + 47165776.

It is an arithmetic number, because the mean of its divisors is an integer number (188663080).

Almost surely, 2^660320773 is an apocalyptic number.

It is an amenable number.

660320773 is a deficient number, since it is larger than the sum of its proper divisors (94331547).

660320773 is an equidigital number, since it uses as much as digits as its factorization.

660320773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94331546.

The product of its (nonzero) digits is 31752, while the sum is 34.

The square root of 660320773 is about 25696.7074350003. The cubic root of 660320773 is about 870.7997987092.

The spelling of 660320773 in words is "six hundred sixty million, three hundred twenty thousand, seven hundred seventy-three".