66666252330 has 48 divisors (see below), whose sum is σ = 180868446720. Its totient is φ = 17004724704.

The previous prime is 66666252329. The next prime is 66666252361. The reversal of 66666252330 is 3325266666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 16100890 + ... + 16105029.

It is an arithmetic number, because the mean of its divisors is an integer number (3768092640).

Almost surely, 2^66666252330 is an apocalyptic number.

66666252330 is an abundant number, since it is smaller than the sum of its proper divisors (114202194390).

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

66666252330 is a wasteful number, since it uses less digits than its factorization.

66666252330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32205955 (or 32205952 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 45.

The spelling of 66666252330 in words is "sixty-six billion, six hundred sixty-six million, two hundred fifty-two thousand, three hundred thirty".