1661674 has 8 divisors (see below), whose sum is σ = 2848608. Its totient is φ = 712140.

The previous prime is 1661669. The next prime is 1661677. The reversal of 1661674 is 4761661.

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

It is a super-2 number, since 2×1661674² = 5522320964552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1661677) 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, 59332 + ... + 59359.

It is an arithmetic number, because the mean of its divisors is an integer number (356076).

2^1661674 is an apocalyptic number.

1661674 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1661674 is a deficient number, since it is larger than the sum of its proper divisors (1186934).

1661674 is a wasteful number, since it uses less digits than its factorization.

1661674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118700.

The product of its digits is 6048, while the sum is 31.

The square root of 1661674 is about 1289.0593469658. The cubic root of 1661674 is about 118.4446025194. Note that the first 3 decimals are identical.

The spelling of 1661674 in words is "one million, six hundred sixty-one thousand, six hundred seventy-four".