660764445 has 32 divisors (see below), whose sum is σ = 1180168704. Its totient is φ = 312916800.

The previous prime is 660764443. The next prime is 660764477. The reversal of 660764445 is 544467066.

It is a happy number.

It is not a de Polignac number, because 660764445 - 2¹ = 660764443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660764397 and 660764406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660764443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39471 + ... + 53660.

It is an arithmetic number, because the mean of its divisors is an integer number (36880272).

Almost surely, 2^660764445 is an apocalyptic number.

It is an amenable number.

660764445 is a deficient number, since it is larger than the sum of its proper divisors (519404259).

660764445 is a wasteful number, since it uses less digits than its factorization.

660764445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93193.

The product of its (nonzero) digits is 483840, while the sum is 42.

The square root of 660764445 is about 25705.3388423495. The cubic root of 660764445 is about 870.9947862599.

The spelling of 660764445 in words is "six hundred sixty million, seven hundred sixty-four thousand, four hundred forty-five".