660727272 has 32 divisors (see below), whose sum is σ = 1666442880. Its totient is φ = 218292480.

The previous prime is 660727231. The next prime is 660727313. The reversal of 660727272 is 272727066.

It is an interprime number because it is at equal distance from previous prime (660727231) and next prime (660727313).

It is a self number, because there is not a number n which added to its sum of digits gives 660727272.

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, 119104 + ... + 124527.

It is an arithmetic number, because the mean of its divisors is an integer number (52076340).

Almost surely, 2^660727272 is an apocalyptic number.

It is an amenable number.

660727272 is an abundant number, since it is smaller than the sum of its proper divisors (1005715608).

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

660727272 is a wasteful number, since it uses less digits than its factorization.

660727272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243753 (or 243749 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 39.

The square root of 660727272 is about 25704.6157722694. The cubic root of 660727272 is about 870.9784526044.

The spelling of 660727272 in words is "six hundred sixty million, seven hundred twenty-seven thousand, two hundred seventy-two".