16666261332 has 24 divisors (see below), whose sum is σ = 44443363776. Its totient is φ = 4761788928.

The previous prime is 16666261327. The next prime is 16666261373. The reversal of 16666261332 is 23316266661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99203853 + ... + 99204020.

It is an arithmetic number, because the mean of its divisors is an integer number (1851806824).

Almost surely, 2^16666261332 is an apocalyptic number.

16666261332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16666261332 is an abundant number, since it is smaller than the sum of its proper divisors (27777102444).

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

16666261332 is a wasteful number, since it uses less digits than its factorization.

16666261332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198407887 (or 198407885 counting only the distinct ones).

The product of its digits is 279936, while the sum is 42.

The spelling of 16666261332 in words is "sixteen billion, six hundred sixty-six million, two hundred sixty-one thousand, three hundred thirty-two".