1660228858 has 4 divisors (see below), whose sum is σ = 2490343290. Its totient is φ = 830114428.

The previous prime is 1660228841. The next prime is 1660228861. The reversal of 1660228858 is 8588220661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1163696769 + 496532089 = 34113^2 + 22283^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415057213 + ... + 415057216.

Almost surely, 2^1660228858 is an apocalyptic number.

1660228858 is a deficient number, since it is larger than the sum of its proper divisors (830114432).

1660228858 is an equidigital number, since it uses as much as digits as its factorization.

1660228858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830114431.

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 1660228858 is about 40745.9060274772. The cubic root of 1660228858 is about 1184.1025584744.

The spelling of 1660228858 in words is "one billion, six hundred sixty million, two hundred twenty-eight thousand, eight hundred fifty-eight".