1661324174 has 4 divisors (see below), whose sum is σ = 2491986264. Its totient is φ = 830662086.

The previous prime is 1661324143. The next prime is 1661324179. The reversal of 1661324174 is 4714231661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4714231661 = 101 ⋅46675561.

It is a super-2 number, since 2×1661324174² = 5519996022233564552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661324179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415331042 + ... + 415331045.

It is an arithmetic number, because the mean of its divisors is an integer number (622996566).

Almost surely, 2^1661324174 is an apocalyptic number.

1661324174 is a deficient number, since it is larger than the sum of its proper divisors (830662090).

1661324174 is an equidigital number, since it uses as much as digits as its factorization.

1661324174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830662089.

The product of its digits is 24192, while the sum is 35.

The square root of 1661324174 is about 40759.3446218165. The cubic root of 1661324174 is about 1184.3629003658.

The spelling of 1661324174 in words is "one billion, six hundred sixty-one million, three hundred twenty-four thousand, one hundred seventy-four".