66531622 has 8 divisors (see below), whose sum is σ = 100012536. Its totient is φ = 33194112.

The previous prime is 66531607. The next prime is 66531623. The reversal of 66531622 is 22613566.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66531623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34683 + ... + 36550.

It is an arithmetic number, because the mean of its divisors is an integer number (12501567).

Almost surely, 2^66531622 is an apocalyptic number.

66531622 is a deficient number, since it is larger than the sum of its proper divisors (33480914).

66531622 is a wasteful number, since it uses less digits than its factorization.

66531622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71702.

The product of its digits is 12960, while the sum is 31.

The square root of 66531622 is about 8156.6918539320. The cubic root of 66531622 is about 405.2061583137.

The spelling of 66531622 in words is "sixty-six million, five hundred thirty-one thousand, six hundred twenty-two".