66969079 has 8 divisors (see below), whose sum is σ = 67533872. Its totient is φ = 66407040.

The previous prime is 66969061. The next prime is 66969101. The reversal of 66969079 is 97096966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66969079 - 2⁹ = 66968567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66969179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90997 + ... + 91729.

It is an arithmetic number, because the mean of its divisors is an integer number (8441734).

Almost surely, 2^66969079 is an apocalyptic number.

66969079 is a deficient number, since it is larger than the sum of its proper divisors (564793).

66969079 is a wasteful number, since it uses less digits than its factorization.

66969079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377.

The product of its (nonzero) digits is 1102248, while the sum is 52.

The square root of 66969079 is about 8183.4637532038. The cubic root of 66969079 is about 406.0923192716.

The spelling of 66969079 in words is "sixty-six million, nine hundred sixty-nine thousand, seventy-nine".