66155506060245 has 64 divisors (see below), whose sum is σ = 132502711749120. Its totient is φ = 27482043875328.

The previous prime is 66155506060223. The next prime is 66155506060253. The reversal of 66155506060245 is 54206060555166.

66155506060245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66155506060245 - 2¹⁶ = 66155505994709 is a prime.

It is a super-2 number, since 2×66155506060245² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 638946652 + ... + 639050181.

It is an arithmetic number, because the mean of its divisors is an integer number (2070354871080).

Almost surely, 2^{66155506060245} is an apocalyptic number.

It is an amenable number.

66155506060245 is an abundant number, since it is smaller than the sum of its proper divisors (66347205688875).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66155506060245 is a wasteful number, since it uses less digits than its factorization.

66155506060245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277996894.

The product of its (nonzero) digits is 6480000, while the sum is 51.

The spelling of 66155506060245 in words is "sixty-six trillion, one hundred fifty-five billion, five hundred six million, sixty thousand, two hundred forty-five".