61366911 has 4 divisors (see below), whose sum is σ = 81822552. Its totient is φ = 40911272.

The previous prime is 61366909. The next prime is 61366919. The reversal of 61366911 is 11966316.

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 61366911 - 2¹ = 61366909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61366919) 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, 10227816 + ... + 10227821.

It is an arithmetic number, because the mean of its divisors is an integer number (20455638).

Almost surely, 2^61366911 is an apocalyptic number.

61366911 is a deficient number, since it is larger than the sum of its proper divisors (20455641).

61366911 is a wasteful number, since it uses less digits than its factorization.

61366911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20455640.

The product of its digits is 5832, while the sum is 33.

The square root of 61366911 is about 7833.7035302595. The cubic root of 61366911 is about 394.4374002107.

The spelling of 61366911 in words is "sixty-one million, three hundred sixty-six thousand, nine hundred eleven".