66672030 has 32 divisors (see below), whose sum is σ = 161488800. Its totient is φ = 17615232.

The previous prime is 66672017. The next prime is 66672031. The reversal of 66672030 is 3027666.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66672031) 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 15 ways as a sum of consecutive naturals, for example, 6925 + ... + 13464.

It is an arithmetic number, because the mean of its divisors is an integer number (5046525).

Almost surely, 2^66672030 is an apocalyptic number.

66672030 is an abundant number, since it is smaller than the sum of its proper divisors (94816770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66672030 is a wasteful number, since it uses less digits than its factorization.

66672030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20508.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 66672030 is about 8165.2942384215. The cubic root of 66672030 is about 405.4910063722.

Adding to 66672030 its reverse (3027666), we get a palindrome (69699696).

The spelling of 66672030 in words is "sixty-six million, six hundred seventy-two thousand, thirty".