61166677839 has 4 divisors (see below), whose sum is σ = 81555570456. Its totient is φ = 40777785224.

The previous prime is 61166677811. The next prime is 61166677853. The reversal of 61166677839 is 93877666116.

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 61166677839 - 2¹⁹ = 61166153551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61166677889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10194446304 + ... + 10194446309.

It is an arithmetic number, because the mean of its divisors is an integer number (20388892614).

Almost surely, 2^61166677839 is an apocalyptic number.

61166677839 is a deficient number, since it is larger than the sum of its proper divisors (20388892617).

61166677839 is a wasteful number, since it uses less digits than its factorization.

61166677839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20388892616.

The product of its digits is 13716864, while the sum is 60.

The spelling of 61166677839 in words is "sixty-one billion, one hundred sixty-six million, six hundred seventy-seven thousand, eight hundred thirty-nine".