66254561325403 has 4 divisors (see below), whose sum is σ = 72277703264088. Its totient is φ = 60231419386720.

The previous prime is 66254561325373. The next prime is 66254561325431. The reversal of 66254561325403 is 30452316545266.

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 66254561325403 - 2¹³ = 66254561317211 is a prime.

It is a super-2 number, since 2×66254561325403² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66254561325473) 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, 3011570969326 + ... + 3011570969347.

It is an arithmetic number, because the mean of its divisors is an integer number (18069425816022).

Almost surely, 2^{66254561325403} is an apocalyptic number.

66254561325403 is a deficient number, since it is larger than the sum of its proper divisors (6023141938685).

66254561325403 is a wasteful number, since it uses less digits than its factorization.

66254561325403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023141938684.

The product of its (nonzero) digits is 15552000, while the sum is 52.

The spelling of 66254561325403 in words is "sixty-six trillion, two hundred fifty-four billion, five hundred sixty-one million, three hundred twenty-five thousand, four hundred three".