1660911249 has 8 divisors (see below), whose sum is σ = 2266049632. Its totient is φ = 1081523520.

The previous prime is 1660911209. The next prime is 1660911253. The reversal of 1660911249 is 9421190661.

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

It is not a de Polignac number, because 1660911249 - 2²¹ = 1658814097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1660911209) 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, 6437512 + ... + 6437769.

It is an arithmetic number, because the mean of its divisors is an integer number (283256204).

Almost surely, 2^1660911249 is an apocalyptic number.

It is an amenable number.

1660911249 is a deficient number, since it is larger than the sum of its proper divisors (605138383).

1660911249 is a wasteful number, since it uses less digits than its factorization.

1660911249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12875327.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1660911249 is about 40754.2789041838. The cubic root of 1660911249 is about 1184.2647670851.

The spelling of 1660911249 in words is "one billion, six hundred sixty million, nine hundred eleven thousand, two hundred forty-nine".