1899953570066 has 4 divisors (see below), whose sum is σ = 2849930355102. Its totient is φ = 949976785032.

The previous prime is 1899953570041. The next prime is 1899953570069. The reversal of 1899953570066 is 6600753599981.

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., 951949511041 + 948004059025 = 975679^2 + 973655^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1899953569978 and 1899953570005.

It is not an unprimeable number, because it can be changed into a prime (1899953570069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474988392515 + ... + 474988392518.

Almost surely, 2^{1899953570066} is an apocalyptic number.

1899953570066 is a deficient number, since it is larger than the sum of its proper divisors (949976785036).

1899953570066 is an equidigital number, since it uses as much as digits as its factorization.

1899953570066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949976785035.

The product of its (nonzero) digits is 110224800, while the sum is 68.

The spelling of 1899953570066 in words is "one trillion, eight hundred ninety-nine billion, nine hundred fifty-three million, five hundred seventy thousand, sixty-six".