131421666406 has 8 divisors (see below), whose sum is σ = 199909013904. Its totient is φ = 64785328440.

The previous prime is 131421666391. The next prime is 131421666433. The reversal of 131421666406 is 604666124131.

It is a happy number.

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

It is a congruent number.

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, 462752205 + ... + 462752488.

It is an arithmetic number, because the mean of its divisors is an integer number (24988626738).

Almost surely, 2^131421666406 is an apocalyptic number.

131421666406 is a deficient number, since it is larger than the sum of its proper divisors (68487347498).

131421666406 is an equidigital number, since it uses as much as digits as its factorization.

131421666406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925504766.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 131421666406 in words is "one hundred thirty-one billion, four hundred twenty-one million, six hundred sixty-six thousand, four hundred six".