5121552666 has 8 divisors (see below), whose sum is σ = 10243105344. Its totient is φ = 1707184220.

The previous prime is 5121552659. The next prime is 5121552697. The reversal of 5121552666 is 6662551215.

It is a happy number.

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

5121552666 is an admirable number.

It is a super-2 number, since 2×5121552666² = 52460603421223415112, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 426796050 + ... + 426796061.

It is an arithmetic number, because the mean of its divisors is an integer number (1280388168).

Almost surely, 2^5121552666 is an apocalyptic number.

5121552666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

5121552666 is a wasteful number, since it uses less digits than its factorization.

5121552666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853592116.

The product of its digits is 108000, while the sum is 39.

The square root of 5121552666 is about 71565.0240410775. The cubic root of 5121552666 is about 1723.7219592863.

The spelling of 5121552666 in words is "five billion, one hundred twenty-one million, five hundred fifty-two thousand, six hundred sixty-six".