66268747 has 2 divisors, whose sum is σ = 66268748. Its totient is φ = 66268746.

The previous prime is 66268733. The next prime is 66268757. The reversal of 66268747 is 74786266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66268747 - 2⁷ = 66268619 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66268697 and 66268706.

It is not a weakly prime, because it can be changed into another prime (66268757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33134373 + 33134374.

It is an arithmetic number, because the mean of its divisors is an integer number (33134374).

Almost surely, 2^66268747 is an apocalyptic number.

66268747 is a deficient number, since it is larger than the sum of its proper divisors (1).

66268747 is an equidigital number, since it uses as much as digits as its factorization.

66268747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The square root of 66268747 is about 8140.5618356475. The cubic root of 66268747 is about 404.6717800038.

The spelling of 66268747 in words is "sixty-six million, two hundred sixty-eight thousand, seven hundred forty-seven".