1241021666 has 4 divisors (see below), whose sum is σ = 1861532502. Its totient is φ = 620510832.

The previous prime is 1241021653. The next prime is 1241021693. The reversal of 1241021666 is 6661201421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 928969441 + 312052225 = 30479^2 + 17665^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 310255415 + ... + 310255418.

Almost surely, 2^1241021666 is an apocalyptic number.

1241021666 is a deficient number, since it is larger than the sum of its proper divisors (620510836).

1241021666 is an equidigital number, since it uses as much as digits as its factorization.

1241021666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620510835.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1241021666 is about 35228.1374188304. The cubic root of 1241021666 is about 1074.6320474260.

The spelling of 1241021666 in words is "one billion, two hundred forty-one million, twenty-one thousand, six hundred sixty-six".