666553411 has 4 divisors (see below), whose sum is σ = 670967824. Its totient is φ = 662139000.

The previous prime is 666553403. The next prime is 666553417. The reversal of 666553411 is 114355666.

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 666553411 - 2³ = 666553403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666553417) 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, 2206980 + ... + 2207281.

It is an arithmetic number, because the mean of its divisors is an integer number (167741956).

Almost surely, 2^666553411 is an apocalyptic number.

666553411 is a deficient number, since it is larger than the sum of its proper divisors (4414413).

666553411 is a wasteful number, since it uses less digits than its factorization.

666553411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414412.

The product of its digits is 64800, while the sum is 37.

The square root of 666553411 is about 25817.6956950073. The cubic root of 666553411 is about 873.5309929658.

The spelling of 666553411 in words is "six hundred sixty-six million, five hundred fifty-three thousand, four hundred eleven".