10021666752 has 42 divisors (see below), whose sum is σ = 28725299928. Its totient is φ = 3340555392.

The previous prime is 10021666747. The next prime is 10021666757. The reversal of 10021666752 is 25766612001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10021666747) and next prime (10021666757).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021666757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8698788 + ... + 8699939.

Almost surely, 2^10021666752 is an apocalyptic number.

10021666752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10021666752 is an abundant number, since it is smaller than the sum of its proper divisors (18703633176).

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

10021666752 is a wasteful number, since it uses less digits than its factorization.

10021666752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17398745 (or 17398732 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 10021666752 in words is "ten billion, twenty-one million, six hundred sixty-six thousand, seven hundred fifty-two".