1660920783 has 8 divisors (see below), whose sum is σ = 2268574896. Its totient is φ = 1080273600.

The previous prime is 1660920769. The next prime is 1660920797. The reversal of 1660920783 is 3870290661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1660920769) and next prime (1660920797).

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

It is not a de Polignac number, because 1660920783 - 2²¹ = 1658823631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660920763) 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, 6751588 + ... + 6751833.

It is an arithmetic number, because the mean of its divisors is an integer number (283571862).

Almost surely, 2^1660920783 is an apocalyptic number.

1660920783 is a deficient number, since it is larger than the sum of its proper divisors (607654113).

1660920783 is a wasteful number, since it uses less digits than its factorization.

1660920783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13503465.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1660920783 is about 40754.3958733288. The cubic root of 1660920783 is about 1184.2670330618.

The spelling of 1660920783 in words is "one billion, six hundred sixty million, nine hundred twenty thousand, seven hundred eighty-three".