4978821667 has 8 divisors (see below), whose sum is σ = 5035448880. Its totient is φ = 4922393760.

The previous prime is 4978821581. The next prime is 4978821691. The reversal of 4978821667 is 7661288794.

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 4978821667 - 2²³ = 4970433059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4978821167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708 + ... + 99790.

It is an arithmetic number, because the mean of its divisors is an integer number (629431110).

Almost surely, 2^4978821667 is an apocalyptic number.

4978821667 is a deficient number, since it is larger than the sum of its proper divisors (56627213).

4978821667 is a wasteful number, since it uses less digits than its factorization.

4978821667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99653.

The product of its digits is 8128512, while the sum is 58.

The square root of 4978821667 is about 70560.7657767403. The cubic root of 4978821667 is about 1707.5582339137.

The spelling of 4978821667 in words is "four billion, nine hundred seventy-eight million, eight hundred twenty-one thousand, six hundred sixty-seven".