6220121350666 has 8 divisors (see below), whose sum is σ = 9426369469860. Its totient is φ = 3077998194048.

The previous prime is 6220121350661. The next prime is 6220121350691. The reversal of 6220121350666 is 6660531210226.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6130472008441 + 89649342225 = 2475979^2 + 299415^2 .

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

It is a super-2 number, since 2×6220121350666² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6220121350661) 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 3 ways as a sum of consecutive naturals, for example, 16031240401 + ... + 16031240788.

Almost surely, 2^{6220121350666} is an apocalyptic number.

6220121350666 is a deficient number, since it is larger than the sum of its proper divisors (3206248119194).

6220121350666 is a wasteful number, since it uses less digits than its factorization.

6220121350666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32062481288.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 6220121350666 in words is "six trillion, two hundred twenty billion, one hundred twenty-one million, three hundred fifty thousand, six hundred sixty-six".