66360401251 has 8 divisors (see below), whose sum is σ = 69250482720. Its totient is φ = 63470723712.

The previous prime is 66360401189. The next prime is 66360401273. The reversal of 66360401251 is 15210406366.

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

It is a cyclic number.

It is not a de Polignac number, because 66360401251 - 2⁷ = 66360401123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66360401651) 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, 262645 + ... + 449113.

It is an arithmetic number, because the mean of its divisors is an integer number (8656310340).

Almost surely, 2^66360401251 is an apocalyptic number.

66360401251 is a deficient number, since it is larger than the sum of its proper divisors (2890081469).

66360401251 is a wasteful number, since it uses less digits than its factorization.

66360401251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201965.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 66360401251 in words is "sixty-six billion, three hundred sixty million, four hundred one thousand, two hundred fifty-one".