8166438492477 has 4 divisors (see below), whose sum is σ = 10888584656640. Its totient is φ = 5444292328316.

The previous prime is 8166438492469. The next prime is 8166438492497. The reversal of 8166438492477 is 7742948346618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8166438492477 - 2³ = 8166438492469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166438492437) 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, 1361073082077 + ... + 1361073082082.

It is an arithmetic number, because the mean of its divisors is an integer number (2722146164160).

Almost surely, 2^{8166438492477} is an apocalyptic number.

It is an amenable number.

8166438492477 is a deficient number, since it is larger than the sum of its proper divisors (2722146164163).

8166438492477 is a wasteful number, since it uses less digits than its factorization.

8166438492477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722146164162.

The product of its digits is 390168576, while the sum is 69.

The spelling of 8166438492477 in words is "eight trillion, one hundred sixty-six billion, four hundred thirty-eight million, four hundred ninety-two thousand, four hundred seventy-seven".