660541628 has 6 divisors (see below), whose sum is σ = 1155947856. Its totient is φ = 330270812.

The previous prime is 660541627. The next prime is 660541643. The reversal of 660541628 is 826145066.

It is a junction number, because it is equal to n+sod(n) for n = 660541591 and 660541600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660541621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82567700 + ... + 82567707.

It is an arithmetic number, because the mean of its divisors is an integer number (192657976).

Almost surely, 2^660541628 is an apocalyptic number.

It is an amenable number.

660541628 is a deficient number, since it is larger than the sum of its proper divisors (495406228).

660541628 is a wasteful number, since it uses less digits than its factorization.

660541628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165135411 (or 165135409 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 660541628 is about 25701.0044161702. The cubic root of 660541628 is about 870.8968722628.

The spelling of 660541628 in words is "six hundred sixty million, five hundred forty-one thousand, six hundred twenty-eight".