1663006431 has 8 divisors (see below), whose sum is σ = 2217798144. Its totient is φ = 1108442840.

The previous prime is 1663006399. The next prime is 1663006447. The reversal of 1663006431 is 1346003661.

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

It is a cyclic number.

It is not a de Polignac number, because 1663006431 - 2⁵ = 1663006399 is a prime.

It is a super-2 number, since 2×1663006431² = 5531180779094715522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663006031) 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, 39225 + ... + 69746.

It is an arithmetic number, because the mean of its divisors is an integer number (277224768).

Almost surely, 2^1663006431 is an apocalyptic number.

1663006431 is a deficient number, since it is larger than the sum of its proper divisors (554791713).

1663006431 is a wasteful number, since it uses less digits than its factorization.

1663006431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114061.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1663006431 is about 40779.9758582567. The cubic root of 1663006431 is about 1184.7625274999.

The spelling of 1663006431 in words is "one billion, six hundred sixty-three million, six thousand, four hundred thirty-one".