131259666 has 32 divisors (see below), whose sum is σ = 275073408. Its totient is φ = 41676800.

The previous prime is 131259659. The next prime is 131259671. The reversal of 131259666 is 666952131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33616 + ... + 37316.

It is an arithmetic number, because the mean of its divisors is an integer number (8596044).

Almost surely, 2^131259666 is an apocalyptic number.

131259666 is an abundant number, since it is smaller than the sum of its proper divisors (143813742).

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

131259666 is a wasteful number, since it uses less digits than its factorization.

131259666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986.

The product of its digits is 58320, while the sum is 39.

The square root of 131259666 is about 11456.8610884483. The cubic root of 131259666 is about 508.2106536405.

It can be divided in two parts, 13125 and 9666, that added together give a triangular number (22791 = T₂₁₃).

The spelling of 131259666 in words is "one hundred thirty-one million, two hundred fifty-nine thousand, six hundred sixty-six".