66498524778075 has 48 divisors (see below), whose sum is σ = 119062936984320. Its totient is φ = 32554842814080.

The previous prime is 66498524778073. The next prime is 66498524778097. The reversal of 66498524778075 is 57087742589466.

It is not a de Polignac number, because 66498524778075 - 2¹ = 66498524778073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66498524778073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 190338367 + ... + 190687416.

It is an arithmetic number, because the mean of its divisors is an integer number (2480477853840).

Almost surely, 2^{66498524778075} is an apocalyptic number.

66498524778075 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66498524778075 is a deficient number, since it is larger than the sum of its proper divisors (52564412206245).

66498524778075 is a wasteful number, since it uses less digits than its factorization.

66498524778075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381025988 (or 381025983 counting only the distinct ones).

The product of its (nonzero) digits is 5689958400, while the sum is 78.

The spelling of 66498524778075 in words is "sixty-six trillion, four hundred ninety-eight billion, five hundred twenty-four million, seven hundred seventy-eight thousand, seventy-five".