661174 has 4 divisors (see below), whose sum is σ = 991764. Its totient is φ = 330586.

The previous prime is 661139. The next prime is 661183. The reversal of 661174 is 471166.

It is a happy number.

661174 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165292 + ... + 165295.

It is an arithmetic number, because the mean of its divisors is an integer number (247941).

2⁶⁶¹¹⁷⁴ is an apocalyptic number.

661174 is a deficient number, since it is larger than the sum of its proper divisors (330590).

661174 is a wasteful number, since it uses less digits than its factorization.

661174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330589.

The product of its digits is 1008, while the sum is 25.

The square root of 661174 is about 813.1260664866. The cubic root of 661174 is about 87.1174702415.

The spelling of 661174 in words is "six hundred sixty-one thousand, one hundred seventy-four".