66607745468487 has 4 divisors (see below), whose sum is σ = 88810327291320. Its totient is φ = 44405163645656.

The previous prime is 66607745468479. The next prime is 66607745468581. The reversal of 66607745468487 is 78486454770666.

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 66607745468487 - 2³ = 66607745468479 is a prime.

It is a super-2 number, since 2×66607745468487² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66607745468477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11101290911412 + ... + 11101290911417.

It is an arithmetic number, because the mean of its divisors is an integer number (22202581822830).

Almost surely, 2^{66607745468487} is an apocalyptic number.

66607745468487 is a deficient number, since it is larger than the sum of its proper divisors (22202581822833).

66607745468487 is a wasteful number, since it uses less digits than its factorization.

66607745468487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22202581822832.

The product of its (nonzero) digits is 9103933440, while the sum is 78.

The spelling of 66607745468487 in words is "sixty-six trillion, six hundred seven billion, seven hundred forty-five million, four hundred sixty-eight thousand, four hundred eighty-seven".