55007777 has 8 divisors (see below), whose sum is σ = 60078720. Its totient is φ = 49948560.

The previous prime is 55007749. The next prime is 55007791. The reversal of 55007777 is 77770055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55007777 - 2⁸ = 55007521 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 55007777.

It is not an unprimeable number, because it can be changed into a prime (55007077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9023 + ... + 13835.

It is an arithmetic number, because the mean of its divisors is an integer number (7509840).

Almost surely, 2^55007777 is an apocalyptic number.

It is an amenable number.

55007777 is a deficient number, since it is larger than the sum of its proper divisors (5070943).

55007777 is a wasteful number, since it uses less digits than its factorization.

55007777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5863.

The product of its (nonzero) digits is 60025, while the sum is 38.

The square root of 55007777 is about 7416.7227937951. The cubic root of 55007777 is about 380.3131698140.

The spelling of 55007777 in words is "fifty-five million, seven thousand, seven hundred seventy-seven".