66034315969 has 4 divisors (see below), whose sum is σ = 66035926980. Its totient is φ = 66032704960.

The previous prime is 66034315957. The next prime is 66034315987. The reversal of 66034315969 is 96951343066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60366033025 + 5668282944 = 245695^2 + 75288^2 .

It is a cyclic number.

It is not a de Polignac number, because 66034315969 - 2²⁵ = 66000761537 is a prime.

It is a super-2 number, since 2×66034315969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66034315939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742372 + ... + 826549.

It is an arithmetic number, because the mean of its divisors is an integer number (16508981745).

Almost surely, 2^66034315969 is an apocalyptic number.

It is an amenable number.

66034315969 is a deficient number, since it is larger than the sum of its proper divisors (1611011).

66034315969 is a wasteful number, since it uses less digits than its factorization.

66034315969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611010.

The product of its (nonzero) digits is 3149280, while the sum is 52.

The spelling of 66034315969 in words is "sixty-six billion, thirty-four million, three hundred fifteen thousand, nine hundred sixty-nine".