66434631 has 8 divisors (see below), whose sum is σ = 88640880. Its totient is φ = 44259072.

The previous prime is 66434609. The next prime is 66434639. The reversal of 66434631 is 13643466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-66434631 is a prime.

It is a super-2 number, since 2×66434631² = 8827120392212322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66434592 and 66434601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66434639) 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 in 7 ways as a sum of consecutive naturals, for example, 2026 + ... + 11703.

It is an arithmetic number, because the mean of its divisors is an integer number (11080110).

Almost surely, 2^66434631 is an apocalyptic number.

66434631 is a deficient number, since it is larger than the sum of its proper divisors (22206249).

66434631 is a wasteful number, since it uses less digits than its factorization.

66434631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15345.

The product of its digits is 31104, while the sum is 33.

The square root of 66434631 is about 8150.7441991514. The cubic root of 66434631 is about 405.0091569336.

The spelling of 66434631 in words is "sixty-six million, four hundred thirty-four thousand, six hundred thirty-one".