3666551361 has 16 divisors (see below), whose sum is σ = 5334310080. Its totient is φ = 2221675520.

The previous prime is 3666551327. The next prime is 3666551377. The reversal of 3666551361 is 1631556663.

It is a cyclic number.

It is not a de Polignac number, because 3666551361 - 2¹⁵ = 3666518593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3666552361) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 200905 + ... + 218393.

It is an arithmetic number, because the mean of its divisors is an integer number (333394380).

Almost surely, 2^3666551361 is an apocalyptic number.

It is an amenable number.

3666551361 is a deficient number, since it is larger than the sum of its proper divisors (1667758719).

3666551361 is a wasteful number, since it uses less digits than its factorization.

3666551361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23856.

The product of its digits is 291600, while the sum is 42.

The square root of 3666551361 is about 60552.0549692576. The cubic root of 3666551361 is about 1542.0055055730.

The spelling of 3666551361 in words is "three billion, six hundred sixty-six million, five hundred fifty-one thousand, three hundred sixty-one".