384776661 has 8 divisors (see below), whose sum is σ = 522715680. Its totient is φ = 251677712.

The previous prime is 384776647. The next prime is 384776663. The reversal of 384776661 is 166677483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 384776661 - 2⁶ = 384776597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 384776661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384776663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209831 + ... + 1210148.

It is an arithmetic number, because the mean of its divisors is an integer number (65339460).

Almost surely, 2^384776661 is an apocalyptic number.

It is an amenable number.

384776661 is a deficient number, since it is larger than the sum of its proper divisors (137939019).

384776661 is a wasteful number, since it uses less digits than its factorization.

384776661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420035.

The product of its digits is 1016064, while the sum is 48.

The square root of 384776661 is about 19615.7248400359. The cubic root of 384776661 is about 727.3379372357.

It can be divided in two parts, 3847 and 76661, that added together give a palindrome (80508).

The spelling of 384776661 in words is "three hundred eighty-four million, seven hundred seventy-six thousand, six hundred sixty-one".