66427330 has 32 divisors (see below), whose sum is σ = 127059840. Its totient is φ = 24917760.

The previous prime is 66427301. The next prime is 66427337. The reversal of 66427330 is 3372466.

It is a junction number, because it is equal to n+sod(n) for n = 66427292 and 66427301.

It is not an unprimeable number, because it can be changed into a prime (66427337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63915 + ... + 64945.

It is an arithmetic number, because the mean of its divisors is an integer number (3970620).

Almost surely, 2^66427330 is an apocalyptic number.

66427330 is the 5155-th heptagonal number.

66427330 is a deficient number, since it is larger than the sum of its proper divisors (60632510).

66427330 is a wasteful number, since it uses less digits than its factorization.

66427330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 66427330 is about 8150.2963136318. The cubic root of 66427330 is about 404.9943198919.

Adding to 66427330 its reverse (3372466), we get a palindrome (69799796).

The spelling of 66427330 in words is "sixty-six million, four hundred twenty-seven thousand, three hundred thirty".