1666502226040 has 64 divisors (see below), whose sum is σ = 3825794669760. Its totient is φ = 653196595200.

The previous prime is 1666502226001. The next prime is 1666502226049. The reversal of 1666502226040 is 406222056661.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1666502225984 and 1666502226002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666502226049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1734412 + ... + 2518171.

It is an arithmetic number, because the mean of its divisors is an integer number (59778041715).

Almost surely, 2^{1666502226040} is an apocalyptic number.

1666502226040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666502226040 is an abundant number, since it is smaller than the sum of its proper divisors (2159292443720).

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

1666502226040 is a wasteful number, since it uses less digits than its factorization.

1666502226040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252792 (or 4252788 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 1666502226040 in words is "one trillion, six hundred sixty-six billion, five hundred two million, two hundred twenty-six thousand, forty".