161670706 has 4 divisors (see below), whose sum is σ = 242506062. Its totient is φ = 80835352.

The previous prime is 161670623. The next prime is 161670709. The reversal of 161670706 is 607076161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 99181681 + 62489025 = 9959^2 + 7905^2 .

It is a super-2 number, since 2×161670706² = 52274834357076872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161670709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40417675 + ... + 40417678.

Almost surely, 2^161670706 is an apocalyptic number.

161670706 is a deficient number, since it is larger than the sum of its proper divisors (80835356).

161670706 is an equidigital number, since it uses as much as digits as its factorization.

161670706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80835355.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 161670706 is about 12714.9795910178. The cubic root of 161670706 is about 544.7665650125.

The spelling of 161670706 in words is "one hundred sixty-one million, six hundred seventy thousand, seven hundred six".