1663631434 has 8 divisors (see below), whose sum is σ = 2496244608. Its totient is φ = 831549900.

The previous prime is 1663631419. The next prime is 1663631449. The reversal of 1663631434 is 4341363661.

It is an interprime number because it is at equal distance from previous prime (1663631419) and next prime (1663631449).

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

It is a junction number, because it is equal to n+sod(n) for n = 1663631393 and 1663631402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124992 + ... + 137659.

It is an arithmetic number, because the mean of its divisors is an integer number (312030576).

Almost surely, 2^1663631434 is an apocalyptic number.

1663631434 is a deficient number, since it is larger than the sum of its proper divisors (832613174).

1663631434 is a wasteful number, since it uses less digits than its factorization.

1663631434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265820.

The product of its digits is 93312, while the sum is 37.

The square root of 1663631434 is about 40787.6382498423. The cubic root of 1663631434 is about 1184.9109308926.

The spelling of 1663631434 in words is "one billion, six hundred sixty-three million, six hundred thirty-one thousand, four hundred thirty-four".