1665670963 has 8 divisors (see below), whose sum is σ = 1833177456. Its totient is φ = 1500844800.

The previous prime is 1665670957. The next prime is 1665670973. The reversal of 1665670963 is 3690765661.

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-1665670963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1665670943) 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, 668778 + ... + 671263.

It is an arithmetic number, because the mean of its divisors is an integer number (229147182).

Almost surely, 2^1665670963 is an apocalyptic number.

1665670963 is a deficient number, since it is larger than the sum of its proper divisors (167506493).

1665670963 is a wasteful number, since it uses less digits than its factorization.

1665670963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340165.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The square root of 1665670963 is about 40812.6323948848. The cubic root of 1665670963 is about 1185.3949470155.

The spelling of 1665670963 in words is "one billion, six hundred sixty-five million, six hundred seventy thousand, nine hundred sixty-three".