55671777 has 24 divisors (see below), whose sum is σ = 92164800. Its totient is φ = 31721760.

The previous prime is 55671773. The next prime is 55671817. The reversal of 55671777 is 77717655.

55671777 is a `hidden beast` number, since 5 + 567 + 17 + 77 = 666.

It is not a de Polignac number, because 55671777 - 2² = 55671773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55671773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25474 + ... + 27572.

It is an arithmetic number, because the mean of its divisors is an integer number (3840200).

Almost surely, 2^55671777 is an apocalyptic number.

It is an amenable number.

55671777 is a deficient number, since it is larger than the sum of its proper divisors (36493023).

55671777 is a wasteful number, since it uses less digits than its factorization.

55671777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533 (or 2530 counting only the distinct ones).

The product of its digits is 360150, while the sum is 45.

The square root of 55671777 is about 7461.3522232904. The cubic root of 55671777 is about 381.8373095396.

The spelling of 55671777 in words is "fifty-five million, six hundred seventy-one thousand, seven hundred seventy-seven".