66662047 has 2 divisors, whose sum is σ = 66662048. Its totient is φ = 66662046.

The previous prime is 66662033. The next prime is 66662053. The reversal of 66662047 is 74026666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66662047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66661997 and 66662015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66662647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33331023 + 33331024.

It is an arithmetic number, because the mean of its divisors is an integer number (33331024).

Almost surely, 2^66662047 is an apocalyptic number.

66662047 is a deficient number, since it is larger than the sum of its proper divisors (1).

66662047 is an equidigital number, since it uses as much as digits as its factorization.

66662047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 66662047 is about 8164.6829087234. The cubic root of 66662047 is about 405.4707669066.

The spelling of 66662047 in words is "sixty-six million, six hundred sixty-two thousand, forty-seven".