66931422 has 16 divisors (see below), whose sum is σ = 134185872. Its totient is φ = 22256640.

The previous prime is 66931399. The next prime is 66931427. The reversal of 66931422 is 22413966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66931427) 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, 10723 + ... + 15774.

It is an arithmetic number, because the mean of its divisors is an integer number (8386617).

Almost surely, 2^66931422 is an apocalyptic number.

66931422 is an abundant number, since it is smaller than the sum of its proper divisors (67254450).

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

66931422 is a wasteful number, since it uses less digits than its factorization.

66931422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26923.

The product of its digits is 15552, while the sum is 33.

The square root of 66931422 is about 8181.1626313135. The cubic root of 66931422 is about 406.0161891835.

The spelling of 66931422 in words is "sixty-six million, nine hundred thirty-one thousand, four hundred twenty-two".