668852652 has 72 divisors (see below), whose sum is σ = 1744619520. Its totient is φ = 199143360.

The previous prime is 668852651. The next prime is 668852669. The reversal of 668852652 is 256258866.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (668852651) 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, 57549 + ... + 68187.

Almost surely, 2^668852652 is an apocalyptic number.

668852652 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668852652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872309760).

668852652 is an abundant number, since it is smaller than the sum of its proper divisors (1075766868).

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

668852652 is a wasteful number, since it uses less digits than its factorization.

668852652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10703 (or 10688 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 48.

The square root of 668852652 is about 25862.1857544949. The cubic root of 668852652 is about 874.5342400669.

It can be divided in two parts, 6688 and 52652, that added together give a triangular number (59340 = T₃₄₄).

The spelling of 668852652 in words is "six hundred sixty-eight million, eight hundred fifty-two thousand, six hundred fifty-two".