1201666411 has 4 divisors (see below), whose sum is σ = 1310908824. Its totient is φ = 1092424000.

The previous prime is 1201666391. The next prime is 1201666429. The reversal of 1201666411 is 1146661021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201666411 - 2¹⁷ = 1201535339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201666411.

It is not an unprimeable number, because it can be changed into a prime (1201666451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54621190 + ... + 54621211.

It is an arithmetic number, because the mean of its divisors is an integer number (327727206).

Almost surely, 2^1201666411 is an apocalyptic number.

1201666411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201666411 is a deficient number, since it is larger than the sum of its proper divisors (109242413).

1201666411 is a wasteful number, since it uses less digits than its factorization.

1201666411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109242412.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1201666411 is about 34665.0603778502. The cubic root of 1201666411 is about 1063.1502377547.

The spelling of 1201666411 in words is "one billion, two hundred one million, six hundred sixty-six thousand, four hundred eleven".