1663456371 has 8 divisors (see below), whose sum is σ = 2218130640. Its totient is φ = 1108876512.

The previous prime is 1663456343. The next prime is 1663456381. The reversal of 1663456371 is 1736543661.

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

It is not a de Polignac number, because 1663456371 - 2⁵ = 1663456339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1663456321) 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, 53445 + ... + 78633.

It is an arithmetic number, because the mean of its divisors is an integer number (277266330).

Almost surely, 2^1663456371 is an apocalyptic number.

1663456371 is a deficient number, since it is larger than the sum of its proper divisors (554674269).

1663456371 is a wasteful number, since it uses less digits than its factorization.

1663456371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47205.

The product of its digits is 272160, while the sum is 42.

The square root of 1663456371 is about 40785.4921632681. The cubic root of 1663456371 is about 1184.8693669310.

The spelling of 1663456371 in words is "one billion, six hundred sixty-three million, four hundred fifty-six thousand, three hundred seventy-one".