8382551661 has 48 divisors (see below), whose sum is σ = 13624236288. Its totient is φ = 4922736000.

The previous prime is 8382551659. The next prime is 8382551669. The reversal of 8382551661 is 1661552838.

8382551661 is a `hidden beast` number, since 8 + 38 + 2 + 551 + 6 + 61 = 666.

It is not a de Polignac number, because 8382551661 - 2¹ = 8382551659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8382551669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 461035 + ... + 478871.

It is an arithmetic number, because the mean of its divisors is an integer number (283838256).

Almost surely, 2^8382551661 is an apocalyptic number.

It is an amenable number.

8382551661 is a deficient number, since it is larger than the sum of its proper divisors (5241684627).

8382551661 is a wasteful number, since it uses less digits than its factorization.

8382551661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18002 (or 17999 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 8382551661 is about 91556.2759236089. The cubic root of 8382551661 is about 2031.3842436614.

The spelling of 8382551661 in words is "eight billion, three hundred eighty-two million, five hundred fifty-one thousand, six hundred sixty-one".