1866686868370 has 8 divisors (see below), whose sum is σ = 3360036363084. Its totient is φ = 746674747344.

The previous prime is 1866686868311. The next prime is 1866686868383. The reversal of 1866686868370 is 738686866681.

It can be written as a sum of positive squares in 2 ways, for example, as 1769003741521 + 97683126849 = 1330039^2 + 312543^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1866686868293 and 1866686868302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93334343409 + ... + 93334343428.

Almost surely, 2^{1866686868370} is an apocalyptic number.

1866686868370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1866686868370 is a deficient number, since it is larger than the sum of its proper divisors (1493349494714).

1866686868370 is a wasteful number, since it uses less digits than its factorization.

1866686868370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186668686844.

The product of its (nonzero) digits is 668860416, while the sum is 73.

The spelling of 1866686868370 in words is "one trillion, eight hundred sixty-six billion, six hundred eighty-six million, eight hundred sixty-eight thousand, three hundred seventy".