1898003666 has 32 divisors (see below), whose sum is σ = 3115324800. Its totient is φ = 861960960.

The previous prime is 1898003663. The next prime is 1898003683. The reversal of 1898003666 is 6663008981.

It is a super-2 number, since 2×1898003666² = 7204835832298879112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1898003666.

It is not an unprimeable number, because it can be changed into a prime (1898003663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1862105 + ... + 1863123.

It is an arithmetic number, because the mean of its divisors is an integer number (97353900).

Almost surely, 2^1898003666 is an apocalyptic number.

1898003666 is a deficient number, since it is larger than the sum of its proper divisors (1217321134).

1898003666 is a wasteful number, since it uses less digits than its factorization.

1898003666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 1898003666 is about 43566.0838956177. The cubic root of 1898003666 is about 1238.1283909322.

The spelling of 1898003666 in words is "one billion, eight hundred ninety-eight million, three thousand, six hundred sixty-six".