55066387772929 has 9 divisors (see below), whose sum is σ = 59628204829929. Its totient is φ = 50830422742320.

The previous prime is 55066387772917. The next prime is 55066387772959. The reversal of 55066387772929 is 92927778366055.

The square root of 55066387772929 is 7420673.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10452644633025 + 44613743139904 = 3233055^2 + 6679352^2 .

It is not a de Polignac number, because 55066387772929 - 2²⁹ = 55065850902017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55066387772959) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 96183339 + ... + 96754159.

Almost surely, 2^{55066387772929} is an apocalyptic number.

55066387772929 is the 7420673-rd square number.

55066387772929 is the 3710337-th centered octagonal number.

It is an amenable number.

55066387772929 is a deficient number, since it is larger than the sum of its proper divisors (4561817057000).

55066387772929 is an frugal number, since it uses more digits than its factorization.

55066387772929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141668 (or 570834 counting only the distinct ones).

The product of its (nonzero) digits is 2400451200, while the sum is 76.

The spelling of 55066387772929 in words is "fifty-five trillion, sixty-six billion, three hundred eighty-seven million, seven hundred seventy-two thousand, nine hundred twenty-nine".