66949079 has 2 divisors, whose sum is σ = 66949080. Its totient is φ = 66949078.

The previous prime is 66949063. The next prime is 66949087. The reversal of 66949079 is 97094966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66949079 - 2⁴ = 66949063 is a prime.

It is a super-3 number, since 3×66949079³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66946079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33474539 + 33474540.

It is an arithmetic number, because the mean of its divisors is an integer number (33474540).

Almost surely, 2^66949079 is an apocalyptic number.

66949079 is a deficient number, since it is larger than the sum of its proper divisors (1).

66949079 is an equidigital number, since it uses as much as digits as its factorization.

66949079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 66949079 is about 8182.2416855040. The cubic root of 66949079 is about 406.0518893939.

The spelling of 66949079 in words is "sixty-six million, nine hundred forty-nine thousand, seventy-nine".