131666430 has 96 divisors (see below), whose sum is σ = 376320384. Its totient is φ = 29381184.

The previous prime is 131666429. The next prime is 131666443. The reversal of 131666430 is 34666131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62169 + ... + 64251.

It is an arithmetic number, because the mean of its divisors is an integer number (3920004).

Almost surely, 2^131666430 is an apocalyptic number.

131666430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131666430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188160192).

131666430 is an abundant number, since it is smaller than the sum of its proper divisors (244653954).

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

131666430 is a wasteful number, since it uses less digits than its factorization.

131666430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 2143 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 131666430 is about 11474.5993394105. The cubic root of 131666430 is about 508.7350813721.

The spelling of 131666430 in words is "one hundred thirty-one million, six hundred sixty-six thousand, four hundred thirty".