66452537 has 2 divisors, whose sum is σ = 66452538. Its totient is φ = 66452536.

The previous prime is 66452527. The next prime is 66452563. The reversal of 66452537 is 73525466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48846121 + 17606416 = 6989^2 + 4196^2 .

It is a cyclic number.

It is not a de Polignac number, because 66452537 - 2¹² = 66448441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66452537.

It is not a weakly prime, because it can be changed into another prime (66452527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33226268 + 33226269.

It is an arithmetic number, because the mean of its divisors is an integer number (33226269).

Almost surely, 2^66452537 is an apocalyptic number.

It is an amenable number.

66452537 is a deficient number, since it is larger than the sum of its proper divisors (1).

66452537 is an equidigital number, since it uses as much as digits as its factorization.

66452537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 38.

The square root of 66452537 is about 8151.8425524540. The cubic root of 66452537 is about 405.0455407815.

The spelling of 66452537 in words is "sixty-six million, four hundred fifty-two thousand, five hundred thirty-seven".