1660665498 has 16 divisors (see below), whose sum is σ = 3353578176. Its totient is φ = 548180640.

The previous prime is 1660665491. The next prime is 1660665499. The reversal of 1660665498 is 8945660661.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660665498.

It is not an unprimeable number, because it can be changed into a prime (1660665491) 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, 1342963 + ... + 1344198.

It is an arithmetic number, because the mean of its divisors is an integer number (209598636).

Almost surely, 2^1660665498 is an apocalyptic number.

1660665498 is an abundant number, since it is smaller than the sum of its proper divisors (1692912678).

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

1660665498 is a wasteful number, since it uses less digits than its factorization.

1660665498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687269.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 1660665498 is about 40751.2637595449. The cubic root of 1660665498 is about 1184.2063556546.

The spelling of 1660665498 in words is "one billion, six hundred sixty million, six hundred sixty-five thousand, four hundred ninety-eight".