161677960 has 16 divisors (see below), whose sum is σ = 363775500. Its totient is φ = 64671168.

The previous prime is 161677949. The next prime is 161677961. The reversal of 161677960 is 69776161.

It can be written as a sum of positive squares in 2 ways, for example, as 147525316 + 14152644 = 12146^2 + 3762^2 .

It is a super-2 number, since 2×161677960² = 52279525499523200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161677961) 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, 2020935 + ... + 2021014.

Almost surely, 2^161677960 is an apocalyptic number.

161677960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161677960 is an abundant number, since it is smaller than the sum of its proper divisors (202097540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161677960 is a wasteful number, since it uses less digits than its factorization.

161677960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041960 (or 4041956 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 161677960 is about 12715.2648419134. The cubic root of 161677960 is about 544.7747125977.

The spelling of 161677960 in words is "one hundred sixty-one million, six hundred seventy-seven thousand, nine hundred sixty".