66512540134425 has 384 divisors, whose sum is σ = 145127791226880. Its totient is φ = 26040268800000.

The previous prime is 66512540134367. The next prime is 66512540134451. The reversal of 66512540134425 is 52443104521566.

It is not a de Polignac number, because 66512540134425 - 2⁶ = 66512540134361 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 15832547325 + ... + 15832551525.

It is an arithmetic number, because the mean of its divisors is an integer number (377936956320).

Almost surely, 2^{66512540134425} is an apocalyptic number.

It is an amenable number.

66512540134425 is an abundant number, since it is smaller than the sum of its proper divisors (78615251092455).

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

66512540134425 is a wasteful number, since it uses less digits than its factorization.

66512540134425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025 (or 5020 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 66512540134425 in words is "sixty-six trillion, five hundred twelve billion, five hundred forty million, one hundred thirty-four thousand, four hundred twenty-five".