1661414674 has 4 divisors (see below), whose sum is σ = 2492122014. Its totient is φ = 830707336.

The previous prime is 1661414639. The next prime is 1661414753. The reversal of 1661414674 is 4764141661.

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., 876574449 + 784840225 = 29607^2 + 28015^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 415353667 + ... + 415353670.

Almost surely, 2^1661414674 is an apocalyptic number.

1661414674 is a deficient number, since it is larger than the sum of its proper divisors (830707340).

1661414674 is an equidigital number, since it uses as much as digits as its factorization.

1661414674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830707339.

The product of its digits is 96768, while the sum is 40.

The square root of 1661414674 is about 40760.4547815649. The cubic root of 1661414674 is about 1184.3844058809.

The spelling of 1661414674 in words is "one billion, six hundred sixty-one million, four hundred fourteen thousand, six hundred seventy-four".