66869046969 has 4 divisors (see below), whose sum is σ = 89158729296. Its totient is φ = 44579364644.

The previous prime is 66869046949. The next prime is 66869046989. The reversal of 66869046969 is 96964096866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (66869046949) and next prime (66869046989).

It is a cyclic number.

It is not a de Polignac number, because 66869046969 - 2²¹ = 66866949817 is a prime.

It is a super-2 number, since 2×66869046969² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66869046919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11144841159 + ... + 11144841164.

It is an arithmetic number, because the mean of its divisors is an integer number (22289682324).

Almost surely, 2^66869046969 is an apocalyptic number.

It is an amenable number.

66869046969 is a deficient number, since it is larger than the sum of its proper divisors (22289682327).

66869046969 is a wasteful number, since it uses less digits than its factorization.

66869046969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22289682326.

The product of its (nonzero) digits is 181398528, while the sum is 69.

The spelling of 66869046969 in words is "sixty-six billion, eight hundred sixty-nine million, forty-six thousand, nine hundred sixty-nine".