66172633 has 8 divisors (see below), whose sum is σ = 69176448. Its totient is φ = 63179424.

The previous prime is 66172627. The next prime is 66172637. The reversal of 66172633 is 33627166.

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

It is a cyclic number.

It is not a de Polignac number, because 66172633 - 2⁹ = 66172121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66172637) 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, 11860 + ... + 16522.

It is an arithmetic number, because the mean of its divisors is an integer number (8647056).

Almost surely, 2^66172633 is an apocalyptic number.

It is an amenable number.

66172633 is a deficient number, since it is larger than the sum of its proper divisors (3003815).

66172633 is a wasteful number, since it uses less digits than its factorization.

66172633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303.

The product of its digits is 27216, while the sum is 34.

The square root of 66172633 is about 8134.6562926776. The cubic root of 66172633 is about 404.4760444864.

Adding to 66172633 its reverse (33627166), we get a palindrome (99799799).

The spelling of 66172633 in words is "sixty-six million, one hundred seventy-two thousand, six hundred thirty-three".