66260651 has 2 divisors, whose sum is σ = 66260652. Its totient is φ = 66260650.

The previous prime is 66260639. The next prime is 66260687. The reversal of 66260651 is 15606266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66260651 - 2¹⁴ = 66244267 is a prime.

It is a Chen prime.

It is equal to p_3910676 and since 66260651 and 3910676 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (66260351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33130325 + 33130326.

It is an arithmetic number, because the mean of its divisors is an integer number (33130326).

Almost surely, 2^66260651 is an apocalyptic number.

66260651 is a deficient number, since it is larger than the sum of its proper divisors (1).

66260651 is an equidigital number, since it uses as much as digits as its factorization.

66260651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66260651 is about 8140.0645574836. The cubic root of 66260651 is about 404.6552998564.

The spelling of 66260651 in words is "sixty-six million, two hundred sixty thousand, six hundred fifty-one".