1866687020170 has 48 divisors (see below), whose sum is σ = 3923483575680. Its totient is φ = 626389756704.

The previous prime is 1866687020131. The next prime is 1866687020213. The reversal of 1866687020170 is 710207866681.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5881350 + ... + 6190609.

It is an arithmetic number, because the mean of its divisors is an integer number (81739241160).

Almost surely, 2^{1866687020170} is an apocalyptic number.

1866687020170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1866687020170 is an abundant number, since it is smaller than the sum of its proper divisors (2056796555510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1866687020170 is a wasteful number, since it uses less digits than its factorization.

1866687020170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12072067 (or 12072020 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 1866687020170 in words is "one trillion, eight hundred sixty-six billion, six hundred eighty-seven million, twenty thousand, one hundred seventy".