1659669498 has 24 divisors (see below), whose sum is σ = 3596736000. Its totient is φ = 553102344.

The previous prime is 1659669491. The next prime is 1659669511. The reversal of 1659669498 is 8949669561.

It is not an unprimeable number, because it can be changed into a prime (1659669491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120153 + ... + 133251.

It is an arithmetic number, because the mean of its divisors is an integer number (149864000).

Almost surely, 2^1659669498 is an apocalyptic number.

1659669498 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1659669498 is an abundant number, since it is smaller than the sum of its proper divisors (1937066502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1659669498 is a wasteful number, since it uses less digits than its factorization.

1659669498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20146 (or 20143 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The square root of 1659669498 is about 40739.0414467498. The cubic root of 1659669498 is about 1183.9695619496.

Adding to 1659669498 its sum of digits (63), we get a palindrome (1659669561).

The spelling of 1659669498 in words is "one billion, six hundred fifty-nine million, six hundred sixty-nine thousand, four hundred ninety-eight".