211665610001 has 8 divisors (see below), whose sum is σ = 215467161600. Its totient is φ = 207892114560.

The previous prime is 211665609979. The next prime is 211665610109. The reversal of 211665610001 is 100016566112.

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

It is a cyclic number.

It is not a de Polignac number, because 211665610001 - 2⁶ = 211665609937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211665610801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6998816 + ... + 7028993.

It is an arithmetic number, because the mean of its divisors is an integer number (26933395200).

Almost surely, 2^211665610001 is an apocalyptic number.

It is an amenable number.

211665610001 is a deficient number, since it is larger than the sum of its proper divisors (3801551599).

211665610001 is a wasteful number, since it uses less digits than its factorization.

211665610001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14028079.

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 211665610001 in words is "two hundred eleven billion, six hundred sixty-five million, six hundred ten thousand, one".