66131416 has 16 divisors (see below), whose sum is σ = 133534800. Its totient is φ = 30522144.

The previous prime is 66131413. The next prime is 66131423. The reversal of 66131416 is 61413166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66131413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317836 + ... + 318043.

It is an arithmetic number, because the mean of its divisors is an integer number (8345925).

Almost surely, 2^66131416 is an apocalyptic number.

It is an amenable number.

66131416 is an abundant number, since it is smaller than the sum of its proper divisors (67403384).

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

66131416 is a wasteful number, since it uses less digits than its factorization.

66131416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635898 (or 635894 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 66131416 is about 8132.1224781726. The cubic root of 66131416 is about 404.3920482737.

The spelling of 66131416 in words is "sixty-six million, one hundred thirty-one thousand, four hundred sixteen".