161776677 has 8 divisors (see below), whose sum is σ = 215780320. Its totient is φ = 107812080.

The previous prime is 161776673. The next prime is 161776721. The reversal of 161776677 is 776677161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161776677 - 2² = 161776673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161776673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1899 + ... + 18087.

It is an arithmetic number, because the mean of its divisors is an integer number (26972540).

Almost surely, 2^161776677 is an apocalyptic number.

It is an amenable number.

161776677 is a deficient number, since it is larger than the sum of its proper divisors (54003643).

161776677 is a wasteful number, since it uses less digits than its factorization.

161776677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19523.

The product of its digits is 518616, while the sum is 48.

The square root of 161776677 is about 12719.1460798278. The cubic root of 161776677 is about 544.8855658512.

The spelling of 161776677 in words is "one hundred sixty-one million, seven hundred seventy-six thousand, six hundred seventy-seven".