1869028066 has 4 divisors (see below), whose sum is σ = 2803542102. Its totient is φ = 934514032.

The previous prime is 1869027997. The next prime is 1869028079. The reversal of 1869028066 is 6608209681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6608209681 = 97 ⋅68125873.

It can be written as a sum of positive squares in only one way, i.e., 1745484841 + 123543225 = 41779^2 + 11115^2 .

It is a super-2 number, since 2×1869028066² = 6986531822991400712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 467257015 + ... + 467257018.

Almost surely, 2^1869028066 is an apocalyptic number.

1869028066 is a deficient number, since it is larger than the sum of its proper divisors (934514036).

1869028066 is an equidigital number, since it uses as much as digits as its factorization.

1869028066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934514035.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 1869028066 is about 43232.2572392421. The cubic root of 1869028066 is about 1231.7954842848.

The spelling of 1869028066 in words is "one billion, eight hundred sixty-nine million, twenty-eight thousand, sixty-six".