131667777 has 12 divisors (see below), whose sum is σ = 200196880. Its totient is φ = 83158488.

The previous prime is 131667761. The next prime is 131667779. The reversal of 131667777 is 777766131.

It is not a de Polignac number, because 131667777 - 2⁴ = 131667761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131667779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384823 + ... + 385164.

Almost surely, 2^131667777 is an apocalyptic number.

It is an amenable number.

131667777 is a deficient number, since it is larger than the sum of its proper divisors (68529103).

131667777 is a wasteful number, since it uses less digits than its factorization.

131667777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770012 (or 770009 counting only the distinct ones).

The product of its digits is 259308, while the sum is 45.

The square root of 131667777 is about 11474.6580341202. The cubic root of 131667777 is about 508.7368162203.

The spelling of 131667777 in words is "one hundred thirty-one million, six hundred sixty-seven thousand, seven hundred seventy-seven".