66996101 has 2 divisors, whose sum is σ = 66996102. Its totient is φ = 66996100.

The previous prime is 66996089. The next prime is 66996131. The reversal of 66996101 is 10169966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40627876 + 26368225 = 6374^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 66996101 - 2²² = 62801797 is a prime.

It is a pancake number, because a pancake can be divided into 66996101 parts by 11575 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66996131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33498050 + 33498051.

It is an arithmetic number, because the mean of its divisors is an integer number (33498051).

Almost surely, 2^66996101 is an apocalyptic number.

It is an amenable number.

66996101 is a deficient number, since it is larger than the sum of its proper divisors (1).

66996101 is an equidigital number, since it uses as much as digits as its factorization.

66996101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 66996101 is about 8185.1145990756. The cubic root of 66996101 is about 406.1469312967.

The spelling of 66996101 in words is "sixty-six million, nine hundred ninety-six thousand, one hundred one".