55166977 has 2 divisors, whose sum is σ = 55166978. Its totient is φ = 55166976.

The previous prime is 55166959. The next prime is 55166983. The reversal of 55166977 is 77966155.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44675856 + 10491121 = 6684^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 55166977 - 2¹¹ = 55164929 is a prime.

It is not a weakly prime, because it can be changed into another prime (55166957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27583488 + 27583489.

It is an arithmetic number, because the mean of its divisors is an integer number (27583489).

Almost surely, 2^55166977 is an apocalyptic number.

It is an amenable number.

55166977 is a deficient number, since it is larger than the sum of its proper divisors (1).

55166977 is an equidigital number, since it uses as much as digits as its factorization.

55166977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 396900, while the sum is 46.

The square root of 55166977 is about 7427.4475427296. The cubic root of 55166977 is about 380.6797091432.

It can be divided in two parts, 551 and 66977, that added together give a triangular number (67528 = T₃₆₇).

The spelling of 55166977 in words is "fifty-five million, one hundred sixty-six thousand, nine hundred seventy-seven".