66052993 has 2 divisors, whose sum is σ = 66052994. Its totient is φ = 66052992.

The previous prime is 66052963. The next prime is 66052997. The reversal of 66052993 is 39925066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65658609 + 394384 = 8103^2 + 628^2 .

It is a cyclic number.

It is not a de Polignac number, because 66052993 - 2¹³ = 66044801 is a prime.

It is not a weakly prime, because it can be changed into another prime (66052997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33026496 + 33026497.

It is an arithmetic number, because the mean of its divisors is an integer number (33026497).

Almost surely, 2^66052993 is an apocalyptic number.

It is an amenable number.

66052993 is a deficient number, since it is larger than the sum of its proper divisors (1).

66052993 is an equidigital number, since it uses as much as digits as its factorization.

66052993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 66052993 is about 8127.2992439063. The cubic root of 66052993 is about 404.2321334463.

The spelling of 66052993 in words is "sixty-six million, fifty-two thousand, nine hundred ninety-three".