1866309022090 has 16 divisors (see below), whose sum is σ = 3360560792040. Its totient is φ = 746255930560.

The previous prime is 1866309022079. The next prime is 1866309022099. The reversal of 1866309022090 is 902209036681.

It can be written as a sum of positive squares in 4 ways, for example, as 1716579493489 + 149729528601 = 1310183^2 + 386949^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1866309022090.

It is not an unprimeable number, because it can be changed into a prime (1866309022099) 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, 33430501 + ... + 33486280.

Almost surely, 2^{1866309022090} is an apocalyptic number.

1866309022090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1866309022090 is a deficient number, since it is larger than the sum of its proper divisors (1494251769950).

1866309022090 is a wasteful number, since it uses less digits than its factorization.

1866309022090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66919577.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 1866309022090 in words is "one trillion, eight hundred sixty-six billion, three hundred nine million, twenty-two thousand, ninety".