1666452532 has 36 divisors (see below), whose sum is σ = 3083820096. Its totient is φ = 787844880.

The previous prime is 1666452481. The next prime is 1666452569. The reversal of 1666452532 is 2352546661.

It is a happy number.

It is a super-2 number, since 2×1666452532² = 5554128082818422048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1170373 + ... + 1171795.

Almost surely, 2^1666452532 is an apocalyptic number.

It is an amenable number.

1666452532 is a deficient number, since it is larger than the sum of its proper divisors (1417367564).

1666452532 is a wasteful number, since it uses less digits than its factorization.

1666452532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276 (or 2255 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The square root of 1666452532 is about 40822.2063587945. The cubic root of 1666452532 is about 1185.5803223778.

It can be divided in two parts, 16664 and 52532, that added together give a palindrome (69196).

The spelling of 1666452532 in words is "one billion, six hundred sixty-six million, four hundred fifty-two thousand, five hundred thirty-two".