1661373053 has 8 divisors (see below), whose sum is σ = 1824849600. Its totient is φ = 1505500128.

The previous prime is 1661373041. The next prime is 1661373089. The reversal of 1661373053 is 3503731661.

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

It is a cyclic number.

It is not a de Polignac number, because 1661373053 - 2⁴ = 1661373037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661373353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1900448 + ... + 1901321.

It is an arithmetic number, because the mean of its divisors is an integer number (228106200).

Almost surely, 2^1661373053 is an apocalyptic number.

It is an amenable number.

1661373053 is a deficient number, since it is larger than the sum of its proper divisors (163476547).

1661373053 is a wasteful number, since it uses less digits than its factorization.

1661373053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801811.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 1661373053 is about 40759.9442222386. The cubic root of 1661373053 is about 1184.3745155796.

The spelling of 1661373053 in words is "one billion, six hundred sixty-one million, three hundred seventy-three thousand, fifty-three".