66707404037 has 2 divisors, whose sum is σ = 66707404038. Its totient is φ = 66707404036.

The previous prime is 66707403989. The next prime is 66707404051. The reversal of 66707404037 is 73040470766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58501580641 + 8205823396 = 241871^2 + 90586^2 .

It is a cyclic number.

It is not a de Polignac number, because 66707404037 - 2¹⁶ = 66707338501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66707404087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33353702018 + 33353702019.

It is an arithmetic number, because the mean of its divisors is an integer number (33353702019).

Almost surely, 2^66707404037 is an apocalyptic number.

It is an amenable number.

66707404037 is a deficient number, since it is larger than the sum of its proper divisors (1).

66707404037 is an equidigital number, since it uses as much as digits as its factorization.

66707404037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 44.

The spelling of 66707404037 in words is "sixty-six billion, seven hundred seven million, four hundred four thousand, thirty-seven".