66052891 has 2 divisors, whose sum is σ = 66052892. Its totient is φ = 66052890.

The previous prime is 66052853. The next prime is 66052913. The reversal of 66052891 is 19825066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66052891 - 2¹¹ = 66050843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66052891.

It is not a weakly prime, because it can be changed into another prime (66052841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33026445 + 33026446.

It is an arithmetic number, because the mean of its divisors is an integer number (33026446).

Almost surely, 2^66052891 is an apocalyptic number.

66052891 is a deficient number, since it is larger than the sum of its proper divisors (1).

66052891 is an equidigital number, since it uses as much as digits as its factorization.

66052891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 66052891 is about 8127.2929687566. The cubic root of 66052891 is about 404.2319253725.

The spelling of 66052891 in words is "sixty-six million, fifty-two thousand, eight hundred ninety-one".