66423002 has 4 divisors (see below), whose sum is σ = 99634506. Its totient is φ = 33211500.

The previous prime is 66423001. The next prime is 66423013. The reversal of 66423002 is 20032466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63186601 + 3236401 = 7949^2 + 1799^2 .

It is not an unprimeable number, because it can be changed into a prime (66423001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16605749 + ... + 16605752.

Almost surely, 2^66423002 is an apocalyptic number.

66423002 is a deficient number, since it is larger than the sum of its proper divisors (33211504).

66423002 is a wasteful number, since it uses less digits than its factorization.

66423002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33211503.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 66423002 is about 8150.0307974878. The cubic root of 66423002 is about 404.9855240469.

Adding to 66423002 its reverse (20032466), we get a palindrome (86455468).

The spelling of 66423002 in words is "sixty-six million, four hundred twenty-three thousand, two".