66415079 has 2 divisors, whose sum is σ = 66415080. Its totient is φ = 66415078.

The previous prime is 66415057. The next prime is 66415147. The reversal of 66415079 is 97051466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66415079 - 2¹² = 66410983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66415879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33207539 + 33207540.

It is an arithmetic number, because the mean of its divisors is an integer number (33207540).

Almost surely, 2^66415079 is an apocalyptic number.

66415079 is a deficient number, since it is larger than the sum of its proper divisors (1).

66415079 is an equidigital number, since it uses as much as digits as its factorization.

66415079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 66415079 is about 8149.5447112093. The cubic root of 66415079 is about 404.9694210515.

The spelling of 66415079 in words is "sixty-six million, four hundred fifteen thousand, seventy-nine".