6661263700 has 144 divisors (see below), whose sum is σ = 17832330880. Its totient is φ = 2103252480.

The previous prime is 6661263691. The next prime is 6661263701. The reversal of 6661263700 is 73621666.

It is a self number, because there is not a number n which added to its sum of digits gives 6661263700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661263701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7543459 + ... + 7544341.

Almost surely, 2^6661263700 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 6661263700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8916165440).

6661263700 is an abundant number, since it is smaller than the sum of its proper divisors (11171067180).

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

6661263700 is a wasteful number, since it uses less digits than its factorization.

6661263700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746 (or 1739 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 6661263700 is about 81616.5651078260. The cubic root of 6661263700 is about 1881.5634817167.

The spelling of 6661263700 in words is "six billion, six hundred sixty-one million, two hundred sixty-three thousand, seven hundred".