660534330 has 16 divisors (see below), whose sum is σ = 1585282464. Its totient is φ = 176142480.

The previous prime is 660534317. The next prime is 660534349. The reversal of 660534330 is 33435066.

It is a super-2 number, since 2×660534330² = 872611202217097800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 22017811 = 660534330 / (6 + 6 + 0 + 5 + 3 + 4 + 3 + 3 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11008876 + ... + 11008935.

It is an arithmetic number, because the mean of its divisors is an integer number (99080154).

Almost surely, 2^660534330 is an apocalyptic number.

660534330 is an abundant number, since it is smaller than the sum of its proper divisors (924748134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660534330 is a wasteful number, since it uses less digits than its factorization.

660534330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22017821.

The product of its (nonzero) digits is 19440, while the sum is 30.

The square root of 660534330 is about 25700.8624368911. The cubic root of 660534330 is about 870.8936648804.

Adding to 660534330 its reverse (33435066), we get a palindrome (693969396).

The spelling of 660534330 in words is "six hundred sixty million, five hundred thirty-four thousand, three hundred thirty".