1662100102665 has 48 divisors (see below), whose sum is σ = 3018812060160. Its totient is φ = 844364062080.

The previous prime is 1662100102651. The next prime is 1662100102697. The reversal of 1662100102665 is 5662010012661.

1662100102665 is a `hidden beast` number, since 1 + 6 + 621 + 0 + 0 + 1 + 0 + 26 + 6 + 5 = 666.

It is not a de Polignac number, because 1662100102665 - 2⁶ = 1662100102601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3112246 + ... + 3606975.

It is an arithmetic number, because the mean of its divisors is an integer number (62891917920).

Almost surely, 2^{1662100102665} is an apocalyptic number.

1662100102665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1662100102665 is a deficient number, since it is larger than the sum of its proper divisors (1356711957495).

1662100102665 is a wasteful number, since it uses less digits than its factorization.

1662100102665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6719494 (or 6719491 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 1662100102665 in words is "one trillion, six hundred sixty-two billion, one hundred million, one hundred two thousand, six hundred sixty-five".