66431092 has 24 divisors (see below), whose sum is σ = 143083136. Its totient is φ = 26280288.

The previous prime is 66431063. The next prime is 66431093. The reversal of 66431092 is 29013466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66431093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90888 + ... + 91615.

Almost surely, 2^66431092 is an apocalyptic number.

It is an amenable number.

66431092 is an abundant number, since it is smaller than the sum of its proper divisors (76652044).

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

66431092 is a wasteful number, since it uses less digits than its factorization.

66431092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182527 (or 182525 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 66431092 is about 8150.5270995194. The cubic root of 66431092 is about 405.0019651381.

The spelling of 66431092 in words is "sixty-six million, four hundred thirty-one thousand, ninety-two".