66601037 has 2 divisors, whose sum is σ = 66601038. Its totient is φ = 66601036.

The previous prime is 66601033. The next prime is 66601057. The reversal of 66601037 is 73010666.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39363076 + 27237961 = 6274^2 + 5219^2 .

It is a cyclic number.

It is not a de Polignac number, because 66601037 - 2² = 66601033 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66601033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33300518 + 33300519.

It is an arithmetic number, because the mean of its divisors is an integer number (33300519).

Almost surely, 2^66601037 is an apocalyptic number.

It is an amenable number.

66601037 is a deficient number, since it is larger than the sum of its proper divisors (1).

66601037 is an equidigital number, since it uses as much as digits as its factorization.

66601037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 66601037 is about 8160.9458397909. The cubic root of 66601037 is about 405.3470317218.

The spelling of 66601037 in words is "sixty-six million, six hundred one thousand, thirty-seven".