1660853741 has 4 divisors (see below), whose sum is σ = 1663257984. Its totient is φ = 1658449500.

The previous prime is 1660853731. The next prime is 1660853749. The reversal of 1660853741 is 1473580661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1473580661 = 7 ⋅210511523.

It is a cyclic number.

It is not a de Polignac number, because 1660853741 - 2²⁶ = 1593744877 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 (1660853749) 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, 1201085 + ... + 1202466.

It is an arithmetic number, because the mean of its divisors is an integer number (415814496).

Almost surely, 2^1660853741 is an apocalyptic number.

It is an amenable number.

1660853741 is a deficient number, since it is larger than the sum of its proper divisors (2404243).

1660853741 is an equidigital number, since it uses as much as digits as its factorization.

1660853741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404242.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1660853741 is about 40753.5733525295. The cubic root of 1660853741 is about 1184.2510987882.

The spelling of 1660853741 in words is "one billion, six hundred sixty million, eight hundred fifty-three thousand, seven hundred forty-one".