66637147337 has 2 divisors, whose sum is σ = 66637147338. Its totient is φ = 66637147336.

The previous prime is 66637147303. The next prime is 66637147387. The reversal of 66637147337 is 73374173666.

66637147337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66493842496 + 143304841 = 257864^2 + 11971^2 .

It is a cyclic number.

It is not a de Polignac number, because 66637147337 - 2⁶ = 66637147273 is a prime.

It is not a weakly prime, because it can be changed into another prime (66637147387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33318573668 + 33318573669.

It is an arithmetic number, because the mean of its divisors is an integer number (33318573669).

Almost surely, 2^66637147337 is an apocalyptic number.

It is an amenable number.

66637147337 is a deficient number, since it is larger than the sum of its proper divisors (1).

66637147337 is an equidigital number, since it uses as much as digits as its factorization.

66637147337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8001504, while the sum is 53.

The spelling of 66637147337 in words is "sixty-six billion, six hundred thirty-seven million, one hundred forty-seven thousand, three hundred thirty-seven".