660952240 has 240 divisors, whose sum is σ = 1829882880. Its totient is φ = 221045760.

The previous prime is 660952223. The next prime is 660952283. The reversal of 660952240 is 42259066.

It is a super-2 number, since 2×660952240² = 873715727122035200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660952196 and 660952205.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7963239 + ... + 7963321.

It is an arithmetic number, because the mean of its divisors is an integer number (7624512).

Almost surely, 2^660952240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660952240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914941440).

660952240 is an abundant number, since it is smaller than the sum of its proper divisors (1168930640).

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

660952240 is a wasteful number, since it uses less digits than its factorization.

660952240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 660952240 is about 25708.9914232356. The cubic root of 660952240 is about 871.0772932076.

The spelling of 660952240 in words is "six hundred sixty million, nine hundred fifty-two thousand, two hundred forty".