66701051 has 2 divisors, whose sum is σ = 66701052. Its totient is φ = 66701050.

The previous prime is 66701027. The next prime is 66701069. The reversal of 66701051 is 15010766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66701051 - 2⁶ = 66700987 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66701051.

It is not a weakly prime, because it can be changed into another prime (66701651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350525 + 33350526.

It is an arithmetic number, because the mean of its divisors is an integer number (33350526).

Almost surely, 2^66701051 is an apocalyptic number.

66701051 is a deficient number, since it is larger than the sum of its proper divisors (1).

66701051 is an equidigital number, since it uses as much as digits as its factorization.

66701051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 66701051 is about 8167.0711396436. The cubic root of 66701051 is about 405.5498318771.

The spelling of 66701051 in words is "sixty-six million, seven hundred one thousand, fifty-one".