1666949582120 has 32 divisors (see below), whose sum is σ = 3750815293920. Its totient is φ = 666748057920.

The previous prime is 1666949582119. The next prime is 1666949582167. The reversal of 1666949582120 is 212859496661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666949582120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133922 + ... + 1830801.

It is an arithmetic number, because the mean of its divisors is an integer number (117212977935).

Almost surely, 2^{1666949582120} is an apocalyptic number.

1666949582120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666949582120 is an abundant number, since it is smaller than the sum of its proper divisors (2083865711800).

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

1666949582120 is a wasteful number, since it uses less digits than its factorization.

1666949582120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985945 (or 1985941 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 1666949582120 in words is "one trillion, six hundred sixty-six billion, nine hundred forty-nine million, five hundred eighty-two thousand, one hundred twenty".