661614200411 has 4 divisors (see below), whose sum is σ = 661617218592. Its totient is φ = 661611182232.

The previous prime is 661614200383. The next prime is 661614200419. The reversal of 661614200411 is 114002416166.

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 661614200411 - 2²⁶ = 661547091547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661614200419) 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, 1152131 + ... + 1628076.

It is an arithmetic number, because the mean of its divisors is an integer number (165404304648).

Almost surely, 2^661614200411 is an apocalyptic number.

661614200411 is a deficient number, since it is larger than the sum of its proper divisors (3018181).

661614200411 is a wasteful number, since it uses less digits than its factorization.

661614200411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018180.

The product of its (nonzero) digits is 6912, while the sum is 32.

Adding to 661614200411 its reverse (114002416166), we get a palindrome (775616616577).

The spelling of 661614200411 in words is "six hundred sixty-one billion, six hundred fourteen million, two hundred thousand, four hundred eleven".