66536747 has 2 divisors, whose sum is σ = 66536748. Its totient is φ = 66536746.

The previous prime is 66536737. The next prime is 66536749. The reversal of 66536747 is 74763566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66536747 - 2⁶ = 66536683 is a prime.

Together with 66536749, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66536698 and 66536707.

It is not a weakly prime, because it can be changed into another prime (66536749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33268373 + 33268374.

It is an arithmetic number, because the mean of its divisors is an integer number (33268374).

Almost surely, 2^66536747 is an apocalyptic number.

66536747 is a deficient number, since it is larger than the sum of its proper divisors (1).

66536747 is an equidigital number, since it uses as much as digits as its factorization.

66536747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 44.

The square root of 66536747 is about 8157.0060071082. The cubic root of 66536747 is about 405.2165625304.

The spelling of 66536747 in words is "sixty-six million, five hundred thirty-six thousand, seven hundred forty-seven".