66352043402251 has 4 divisors (see below), whose sum is σ = 70255104778872. Its totient is φ = 62448982025632.

The previous prime is 66352043402219. The next prime is 66352043402261. The reversal of 66352043402251 is 15220434025366.

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

It is a cyclic number.

It is not a de Polignac number, because 66352043402251 - 2⁵ = 66352043402219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66352043402198 and 66352043402207.

It is not an unprimeable number, because it can be changed into a prime (66352043402261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1951530688285 + ... + 1951530688318.

It is an arithmetic number, because the mean of its divisors is an integer number (17563776194718).

Almost surely, 2^{66352043402251} is an apocalyptic number.

66352043402251 is a deficient number, since it is larger than the sum of its proper divisors (3903061376621).

66352043402251 is a wasteful number, since it uses less digits than its factorization.

66352043402251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903061376620.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 66352043402251 in words is "sixty-six trillion, three hundred fifty-two billion, forty-three million, four hundred two thousand, two hundred fifty-one".