66431334 has 16 divisors (see below), whose sum is σ = 139855680. Its totient is φ = 20978280.

The previous prime is 66431333. The next prime is 66431347. The reversal of 66431334 is 43313466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66431333) 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, 291252 + ... + 291479.

It is an arithmetic number, because the mean of its divisors is an integer number (8740980).

Almost surely, 2^66431334 is an apocalyptic number.

66431334 is an abundant number, since it is smaller than the sum of its proper divisors (73424346).

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

66431334 is a wasteful number, since it uses less digits than its factorization.

66431334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582755.

The product of its digits is 15552, while the sum is 30.

The square root of 66431334 is about 8150.5419451715. The cubic root of 66431334 is about 405.0024569276.

The spelling of 66431334 in words is "sixty-six million, four hundred thirty-one thousand, three hundred thirty-four".