66055015258 has 4 divisors (see below), whose sum is σ = 99082522890. Its totient is φ = 33027507628.

The previous prime is 66055015223. The next prime is 66055015259. The reversal of 66055015258 is 85251055066.

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

It can be written as a sum of positive squares in only one way, i.e., 44076063249 + 21978952009 = 209943^2 + 148253^2 .

It is a super-2 number, since 2×66055015258² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66055015259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16513753813 + ... + 16513753816.

Almost surely, 2^66055015258 is an apocalyptic number.

66055015258 is a deficient number, since it is larger than the sum of its proper divisors (33027507632).

66055015258 is a wasteful number, since it uses less digits than its factorization.

66055015258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33027507631.

The product of its (nonzero) digits is 360000, while the sum is 43.

The spelling of 66055015258 in words is "sixty-six billion, fifty-five million, fifteen thousand, two hundred fifty-eight".