660040700 has 72 divisors (see below), whose sum is σ = 1571097360. Its totient is φ = 238694400.

The previous prime is 660040699. The next prime is 660040709. The reversal of 660040700 is 7040066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660040709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210746 + ... + 213854.

Almost surely, 2^660040700 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 660040700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785548680).

660040700 is an abundant number, since it is smaller than the sum of its proper divisors (911056660).

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

660040700 is a wasteful number, since it uses less digits than its factorization.

660040700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3327 (or 3320 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 660040700 is about 25691.2572677944. The cubic root of 660040700 is about 870.6766656242.

Adding to 660040700 its reverse (7040066), we get a palindrome (667080766).

The spelling of 660040700 in words is "six hundred sixty million, forty thousand, seven hundred".