66229372 has 24 divisors (see below), whose sum is σ = 126749952. Its totient is φ = 30030000.

The previous prime is 66229363. The next prime is 66229379. The reversal of 66229372 is 27392266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66229379) 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, 18747 + ... + 21997.

It is an arithmetic number, because the mean of its divisors is an integer number (5281248).

Almost surely, 2^66229372 is an apocalyptic number.

It is an amenable number.

66229372 is a deficient number, since it is larger than the sum of its proper divisors (60520580).

66229372 is a wasteful number, since it uses less digits than its factorization.

66229372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3729 (or 3727 counting only the distinct ones).

The product of its digits is 54432, while the sum is 37.

The square root of 66229372 is about 8138.1430314292. The cubic root of 66229372 is about 404.5916159802.

The spelling of 66229372 in words is "sixty-six million, two hundred twenty-nine thousand, three hundred seventy-two".