131666306 has 8 divisors (see below), whose sum is σ = 206086464. Its totient is φ = 62970820.

The previous prime is 131666299. The next prime is 131666399. The reversal of 131666306 is 603666131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×131666306² = 34672032271371272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1431110 + ... + 1431201.

It is an arithmetic number, because the mean of its divisors is an integer number (25760808).

Almost surely, 2^131666306 is an apocalyptic number.

131666306 is a deficient number, since it is larger than the sum of its proper divisors (74420158).

131666306 is a wasteful number, since it uses less digits than its factorization.

131666306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862336.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 131666306 is about 11474.5939361705. The cubic root of 131666306 is about 508.7349216675.

The spelling of 131666306 in words is "one hundred thirty-one million, six hundred sixty-six thousand, three hundred six".