1866470680690 has 32 divisors (see below), whose sum is σ = 4188651087744. Its totient is φ = 581757095040.

The previous prime is 1866470680667. The next prime is 1866470680783. The reversal of 1866470680690 is 960860746681.

It is a super-2 number, since 2×1866470680690² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1211993179 + ... + 1211994718.

It is an arithmetic number, because the mean of its divisors is an integer number (130895346492).

Almost surely, 2^{1866470680690} is an apocalyptic number.

1866470680690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1866470680690 is an abundant number, since it is smaller than the sum of its proper divisors (2322180407054).

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

1866470680690 is a wasteful number, since it uses less digits than its factorization.

1866470680690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423987922.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 1866470680690 in words is "one trillion, eight hundred sixty-six billion, four hundred seventy million, six hundred eighty thousand, six hundred ninety".