66572767 has 2 divisors, whose sum is σ = 66572768. Its totient is φ = 66572766.

The previous prime is 66572743. The next prime is 66572771. The reversal of 66572767 is 76727566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66572767 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 (66572567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33286383 + 33286384.

It is an arithmetic number, because the mean of its divisors is an integer number (33286384).

Almost surely, 2^66572767 is an apocalyptic number.

66572767 is a deficient number, since it is larger than the sum of its proper divisors (1).

66572767 is an equidigital number, since it uses as much as digits as its factorization.

66572767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 46.

The square root of 66572767 is about 8159.2136263245. The cubic root of 66572767 is about 405.2896713421.

The spelling of 66572767 in words is "sixty-six million, five hundred seventy-two thousand, seven hundred sixty-seven".