406566799487 has 4 divisors (see below), whose sum is σ = 424243616880. Its totient is φ = 388889982096.

The previous prime is 406566799481. The next prime is 406566799489. The reversal of 406566799487 is 784997665604.

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 406566799487 - 2⁸ = 406566799231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406566799487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406566799481) 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, 8838408662 + ... + 8838408707.

It is an arithmetic number, because the mean of its divisors is an integer number (106060904220).

Almost surely, 2^406566799487 is an apocalyptic number.

406566799487 is a deficient number, since it is larger than the sum of its proper divisors (17676817393).

406566799487 is a wasteful number, since it uses less digits than its factorization.

406566799487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17676817392.

The product of its (nonzero) digits is 548674560, while the sum is 71.

The spelling of 406566799487 in words is "four hundred six billion, five hundred sixty-six million, seven hundred ninety-nine thousand, four hundred eighty-seven".