660069441 has 12 divisors (see below), whose sum is σ = 962874900. Its totient is φ = 435688800.

The previous prime is 660069437. The next prime is 660069491. The reversal of 660069441 is 144960066.

660069441 is a `hidden beast` number, since 6 + 600 + 6 + 9 + 4 + 41 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 591511041 + 68558400 = 24321^2 + 8280^2 .

It is not a de Polignac number, because 660069441 - 2² = 660069437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660069396 and 660069405.

It is not an unprimeable number, because it can be changed into a prime (660069491) 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, 362166 + ... + 363983.

It is an arithmetic number, because the mean of its divisors is an integer number (80239575).

Almost surely, 2^660069441 is an apocalyptic number.

It is an amenable number.

660069441 is a deficient number, since it is larger than the sum of its proper divisors (302805459).

660069441 is a wasteful number, since it uses less digits than its factorization.

660069441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726256 (or 726253 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 660069441 is about 25691.8166154128. The cubic root of 660069441 is about 870.6893031049.

The spelling of 660069441 in words is "six hundred sixty million, sixty-nine thousand, four hundred forty-one".