66377953529039 has 4 divisors (see below), whose sum is σ = 66380454703080. Its totient is φ = 66375452355000.

The previous prime is 66377953529011. The next prime is 66377953529077. The reversal of 66377953529039 is 93092535977366.

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

It is a cyclic number.

It is not a de Polignac number, because 66377953529039 - 2²⁸ = 66377685093583 is a prime.

It is a super-2 number, since 2×66377953529039² (a number of 28 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 (66377953529339) 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, 1250547212 + ... + 1250600289.

It is an arithmetic number, because the mean of its divisors is an integer number (16595113675770).

Almost surely, 2^{66377953529039} is an apocalyptic number.

66377953529039 is a deficient number, since it is larger than the sum of its proper divisors (2501174041).

66377953529039 is a wasteful number, since it uses less digits than its factorization.

66377953529039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501174040.

The product of its (nonzero) digits is 1736040600, while the sum is 74.

The spelling of 66377953529039 in words is "sixty-six trillion, three hundred seventy-seven billion, nine hundred fifty-three million, five hundred twenty-nine thousand, thirty-nine".