66667037 has 2 divisors, whose sum is σ = 66667038. Its totient is φ = 66667036.

The previous prime is 66666983. The next prime is 66667039. The reversal of 66667037 is 73076666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59382436 + 7284601 = 7706^2 + 2699^2 .

It is a cyclic number.

It is not a de Polignac number, because 66667037 - 2⁶ = 66666973 is a prime.

Together with 66667039, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66666985 and 66667003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66667039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33333518 + 33333519.

It is an arithmetic number, because the mean of its divisors is an integer number (33333519).

Almost surely, 2^66667037 is an apocalyptic number.

It is an amenable number.

66667037 is a deficient number, since it is larger than the sum of its proper divisors (1).

66667037 is an equidigital number, since it uses as much as digits as its factorization.

66667037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 41.

The square root of 66667037 is about 8164.9884874383. The cubic root of 66667037 is about 405.4808838509.

The spelling of 66667037 in words is "sixty-six million, six hundred sixty-seven thousand, thirty-seven".