1661025446 has 8 divisors (see below), whose sum is σ = 2571910464. Its totient is φ = 803721960.

The previous prime is 1661025433. The next prime is 1661025461. The reversal of 1661025446 is 6445201661.

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

It is a congruent 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 in 3 ways as a sum of consecutive naturals, for example, 13395305 + ... + 13395428.

It is an arithmetic number, because the mean of its divisors is an integer number (321488808).

Almost surely, 2^1661025446 is an apocalyptic number.

1661025446 is a deficient number, since it is larger than the sum of its proper divisors (910885018).

1661025446 is a wasteful number, since it uses less digits than its factorization.

1661025446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26790766.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1661025446 is about 40755.6799231714. The cubic root of 1661025446 is about 1184.2919080866.

The spelling of 1661025446 in words is "one billion, six hundred sixty-one million, twenty-five thousand, four hundred forty-six".