6616101601691 has 8 divisors (see below), whose sum is σ = 6620861839584. Its totient is φ = 6611341651200.

The previous prime is 6616101601661. The next prime is 6616101601693. The reversal of 6616101601691 is 1961061016166.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6616101601691 is a prime.

It is a super-2 number, since 2×6616101601691² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6616101601693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70637291 + ... + 70730891.

It is an arithmetic number, because the mean of its divisors is an integer number (827607729948).

Almost surely, 2^{6616101601691} is an apocalyptic number.

6616101601691 is a deficient number, since it is larger than the sum of its proper divisors (4760237893).

6616101601691 is a wasteful number, since it uses less digits than its factorization.

6616101601691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143701.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 6616101601691 in words is "six trillion, six hundred sixteen billion, one hundred one million, six hundred one thousand, six hundred ninety-one".