100666065516490 has 8 divisors (see below), whose sum is σ = 181198917929700. Its totient is φ = 40266426206592.

The previous prime is 100666065516479. The next prime is 100666065516491. The reversal of 100666065516490 is 94615560666001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 96397581423529 + 4268484092961 = 9818227^2 + 2066031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (100666065516491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5033303275815 + ... + 5033303275834.

Almost surely, 2^{100666065516490} is an apocalyptic number.

100666065516490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100666065516490 is a deficient number, since it is larger than the sum of its proper divisors (80532852413210).

100666065516490 is a wasteful number, since it uses less digits than its factorization.

100666065516490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10066606551656.

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 100666065516490 in words is "one hundred trillion, six hundred sixty-six billion, sixty-five million, five hundred sixteen thousand, four hundred ninety".