1665251352 has 64 divisors (see below), whose sum is σ = 4869168000. Its totient is φ = 525867552.

The previous prime is 1665251347. The next prime is 1665251353. The reversal of 1665251352 is 2531525661.

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 (1665251353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198778 + ... + 206985.

It is an arithmetic number, because the mean of its divisors is an integer number (76080750).

Almost surely, 2^1665251352 is an apocalyptic number.

1665251352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1665251352 is an abundant number, since it is smaller than the sum of its proper divisors (3203916648).

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

1665251352 is a wasteful number, since it uses less digits than its factorization.

1665251352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405797 (or 405787 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 1665251352 is about 40807.4913710706. The cubic root of 1665251352 is about 1185.2953982362.

The spelling of 1665251352 in words is "one billion, six hundred sixty-five million, two hundred fifty-one thousand, three hundred fifty-two".