66180000251 has 8 divisors (see below), whose sum is σ = 66343622400. Its totient is φ = 66016437480.

The previous prime is 66180000163. The next prime is 66180000307. The reversal of 66180000251 is 15200008166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66180000251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66180006251) 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, 2920796 + ... + 2943366.

It is an arithmetic number, because the mean of its divisors is an integer number (8292952800).

Almost surely, 2^66180000251 is an apocalyptic number.

66180000251 is a deficient number, since it is larger than the sum of its proper divisors (163622149).

66180000251 is a wasteful number, since it uses less digits than its factorization.

66180000251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29689.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 66180000251 in words is "sixty-six billion, one hundred eighty million, two hundred fifty-one", and thus it is an aban number.