1663403479 has 8 divisors (see below), whose sum is σ = 1668495600. Its totient is φ = 1658319936.

The previous prime is 1663403453. The next prime is 1663403491. The reversal of 1663403479 is 9743043661.

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 1663403479 - 2¹³ = 1663395287 is a prime.

It is a super-2 number, since 2×1663403479² = 5533822267898606882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663403419) 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, 651297 + ... + 653845.

It is an arithmetic number, because the mean of its divisors is an integer number (208561950).

Almost surely, 2^1663403479 is an apocalyptic number.

1663403479 is a deficient number, since it is larger than the sum of its proper divisors (5092121).

1663403479 is a wasteful number, since it uses less digits than its factorization.

1663403479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289.

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 1663403479 is about 40784.8437412723. The cubic root of 1663403479 is about 1184.8568085865.

The spelling of 1663403479 in words is "one billion, six hundred sixty-three million, four hundred three thousand, four hundred seventy-nine".