1660563398 has 8 divisors (see below), whose sum is σ = 2682448608. Its totient is φ = 766413864.

The previous prime is 1660563397. The next prime is 1660563449. The reversal of 1660563398 is 8933650661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660563397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31933886 + ... + 31933937.

It is an arithmetic number, because the mean of its divisors is an integer number (335306076).

Almost surely, 2^1660563398 is an apocalyptic number.

1660563398 is a deficient number, since it is larger than the sum of its proper divisors (1021885210).

1660563398 is a wasteful number, since it uses less digits than its factorization.

1660563398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63867838.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 1660563398 is about 40750.0110184034. The cubic root of 1660563398 is about 1184.1820862785.

The spelling of 1660563398 in words is "one billion, six hundred sixty million, five hundred sixty-three thousand, three hundred ninety-eight".