4661690778 has 40 divisors (see below), whose sum is σ = 10500399360. Its totient is φ = 1545751080.

The previous prime is 4661690777. The next prime is 4661690783. The reversal of 4661690778 is 8770961664.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (4661690773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44388 + ... + 106271.

It is an arithmetic number, because the mean of its divisors is an integer number (262509984).

Almost surely, 2^4661690778 is an apocalyptic number.

4661690778 is an abundant number, since it is smaller than the sum of its proper divisors (5838708582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4661690778 is a wasteful number, since it uses less digits than its factorization.

4661690778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150864 (or 150855 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The square root of 4661690778 is about 68276.5756171178. The cubic root of 4661690778 is about 1670.5051572782.

The spelling of 4661690778 in words is "four billion, six hundred sixty-one million, six hundred ninety thousand, seven hundred seventy-eight".