2066400468487 has 4 divisors (see below), whose sum is σ = 2066419053936. Its totient is φ = 2066381883040.

The previous prime is 2066400468463. The next prime is 2066400468497. The reversal of 2066400468487 is 7848640046602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2066400468487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066400468497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9124939 + ... + 9348652.

It is an arithmetic number, because the mean of its divisors is an integer number (516604763484).

Almost surely, 2^{2066400468487} is an apocalyptic number.

2066400468487 is a deficient number, since it is larger than the sum of its proper divisors (18585449).

2066400468487 is a wasteful number, since it uses less digits than its factorization.

2066400468487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18585448.

The product of its (nonzero) digits is 12386304, while the sum is 55.

The spelling of 2066400468487 in words is "two trillion, sixty-six billion, four hundred million, four hundred sixty-eight thousand, four hundred eighty-seven".