1666129098090 has 32 divisors (see below), whose sum is σ = 3999706563456. Its totient is φ = 444190345280.

The previous prime is 1666129098079. The next prime is 1666129098091. The reversal of 1666129098090 is 908909216661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666129098090.

It is not an unprimeable number, because it can be changed into a prime (1666129098091) 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, 6799326 + ... + 7040105.

It is an arithmetic number, because the mean of its divisors is an integer number (124990830108).

Almost surely, 2^{1666129098090} is an apocalyptic number.

1666129098090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666129098090 is an abundant number, since it is smaller than the sum of its proper divisors (2333577465366).

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

1666129098090 is a wasteful number, since it uses less digits than its factorization.

1666129098090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13843454.

The product of its (nonzero) digits is 2519424, while the sum is 57.

The spelling of 1666129098090 in words is "one trillion, six hundred sixty-six billion, one hundred twenty-nine million, ninety-eight thousand, ninety".