66340567 has 2 divisors, whose sum is σ = 66340568. Its totient is φ = 66340566.

The previous prime is 66340559. The next prime is 66340591. The reversal of 66340567 is 76504366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66340567 - 2³ = 66340559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66340517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33170283 + 33170284.

It is an arithmetic number, because the mean of its divisors is an integer number (33170284).

Almost surely, 2^66340567 is an apocalyptic number.

66340567 is a deficient number, since it is larger than the sum of its proper divisors (1).

66340567 is an equidigital number, since it uses as much as digits as its factorization.

66340567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 66340567 is about 8144.9718845432. The cubic root of 66340567 is about 404.8179174391.

It can be divided in two parts, 66 and 340567, that multiplied together give a palindrome (22477422).

The spelling of 66340567 in words is "sixty-six million, three hundred forty thousand, five hundred sixty-seven".