66994101 has 16 divisors (see below), whose sum is σ = 103566720. Its totient is φ = 42720480.

The previous prime is 66994079. The next prime is 66994111. The reversal of 66994101 is 10149966.

It is not a de Polignac number, because 66994101 - 2¹³ = 66985909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66994111) 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, 53320 + ... + 54561.

It is an arithmetic number, because the mean of its divisors is an integer number (6472920).

Almost surely, 2^66994101 is an apocalyptic number.

It is an amenable number.

66994101 is a deficient number, since it is larger than the sum of its proper divisors (36572619).

66994101 is a wasteful number, since it uses less digits than its factorization.

66994101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107913 (or 107907 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 66994101 is about 8184.9924251645. The cubic root of 66994101 is about 406.1428897583.

The spelling of 66994101 in words is "sixty-six million, nine hundred ninety-four thousand, one hundred one".