1660790949 has 4 divisors (see below), whose sum is σ = 2214387936. Its totient is φ = 1107193964.

The previous prime is 1660790921. The next prime is 1660790959. The reversal of 1660790949 is 9490970661.

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.

It is a cyclic number.

It is not a de Polignac number, because 1660790949 - 2¹¹ = 1660788901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660790909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276798489 + ... + 276798494.

It is an arithmetic number, because the mean of its divisors is an integer number (553596984).

Almost surely, 2^1660790949 is an apocalyptic number.

It is an amenable number.

1660790949 is a deficient number, since it is larger than the sum of its proper divisors (553596987).

1660790949 is an equidigital number, since it uses as much as digits as its factorization.

1660790949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553596986.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 1660790949 is about 40752.8029588150. The cubic root of 1660790949 is about 1184.2361742486.

The spelling of 1660790949 in words is "one billion, six hundred sixty million, seven hundred ninety thousand, nine hundred forty-nine".