66431476 has 6 divisors (see below), whose sum is σ = 116255090. Its totient is φ = 33215736.

The previous prime is 66431473. The next prime is 66431479. The reversal of 66431476 is 67413466.

It is an interprime number because it is at equal distance from previous prime (66431473) and next prime (66431479).

It can be written as a sum of positive squares in only one way, i.e., 62821476 + 3610000 = 7926^2 + 1900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66431473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8303931 + ... + 8303938.

Almost surely, 2^66431476 is an apocalyptic number.

It is an amenable number.

66431476 is a deficient number, since it is larger than the sum of its proper divisors (49823614).

66431476 is a wasteful number, since it uses less digits than its factorization.

66431476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16607873 (or 16607871 counting only the distinct ones).

The product of its digits is 72576, while the sum is 37.

The square root of 66431476 is about 8150.5506562440. The cubic root of 66431476 is about 405.0027454978.

The spelling of 66431476 in words is "sixty-six million, four hundred thirty-one thousand, four hundred seventy-six".