66772051 has 2 divisors, whose sum is σ = 66772052. Its totient is φ = 66772050.

The previous prime is 66772037. The next prime is 66772093. The reversal of 66772051 is 15027766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66772051 - 2¹¹ = 66770003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66771998 and 66772016.

It is not a weakly prime, because it can be changed into another prime (66772001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33386025 + 33386026.

It is an arithmetic number, because the mean of its divisors is an integer number (33386026).

Almost surely, 2^66772051 is an apocalyptic number.

66772051 is a deficient number, since it is larger than the sum of its proper divisors (1).

66772051 is an equidigital number, since it uses as much as digits as its factorization.

66772051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 66772051 is about 8171.4167070343. The cubic root of 66772051 is about 405.6936768244.

The spelling of 66772051 in words is "sixty-six million, seven hundred seventy-two thousand, fifty-one".