66607950029 has 4 divisors (see below), whose sum is σ = 66643514076. Its totient is φ = 66572385984.

The previous prime is 66607949987. The next prime is 66607950043. The reversal of 66607950029 is 92005970666.

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 33810015625 + 32797934404 = 183875^2 + 181102^2 .

It is a cyclic number.

It is not a de Polignac number, because 66607950029 - 2²⁸ = 66339514573 is a prime.

It is a super-2 number, since 2×66607950029² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66607950049) 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, 17779214 + ... + 17782959.

It is an arithmetic number, because the mean of its divisors is an integer number (16660878519).

Almost surely, 2^66607950029 is an apocalyptic number.

It is an amenable number.

66607950029 is a deficient number, since it is larger than the sum of its proper divisors (35564047).

66607950029 is a wasteful number, since it uses less digits than its factorization.

66607950029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35564046.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The spelling of 66607950029 in words is "sixty-six billion, six hundred seven million, nine hundred fifty thousand, twenty-nine".