660338001 has 20 divisors (see below), whose sum is σ = 1013095732. Its totient is φ = 428325408.

The previous prime is 660337999. The next prime is 660338039. The reversal of 660338001 is 100833066.

It can be written as a sum of positive squares in 2 ways, for example, as 585688401 + 74649600 = 24201^2 + 8640^2 .

It is not a de Polignac number, because 660338001 - 2¹ = 660337999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (660338201) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107170 + ... + 113163.

Almost surely, 2^660338001 is an apocalyptic number.

It is an amenable number.

660338001 is a deficient number, since it is larger than the sum of its proper divisors (352757731).

660338001 is a wasteful number, since it uses less digits than its factorization.

660338001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220382 (or 220373 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 660338001 is about 25697.0426508577. The cubic root of 660338001 is about 870.8073718004.

The spelling of 660338001 in words is "six hundred sixty million, three hundred thirty-eight thousand, one".