1665835949 has 8 divisors (see below), whose sum is σ = 1687743360. Its totient is φ = 1643949216.

The previous prime is 1665835921. The next prime is 1665836017. The reversal of 1665835949 is 9495385661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1665835949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1665835894 and 1665835903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665838949) 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, 220889 + ... + 228305.

It is an arithmetic number, because the mean of its divisors is an integer number (210967920).

Almost surely, 2^1665835949 is an apocalyptic number.

It is an amenable number.

1665835949 is a deficient number, since it is larger than the sum of its proper divisors (21907411).

1665835949 is an equidigital number, since it uses as much as digits as its factorization.

1665835949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339.

The product of its digits is 6998400, while the sum is 56.

The square root of 1665835949 is about 40814.6536062723. The cubic root of 1665835949 is about 1185.4340838194.

The spelling of 1665835949 in words is "one billion, six hundred sixty-five million, eight hundred thirty-five thousand, nine hundred forty-nine".