55577766 has 8 divisors (see below), whose sum is σ = 111155544. Its totient is φ = 18525920.

The previous prime is 55577719. The next prime is 55577789. The reversal of 55577766 is 66777555.

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

55577766 is an admirable number.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4631475 + ... + 4631486.

It is an arithmetic number, because the mean of its divisors is an integer number (13894443).

Almost surely, 2^55577766 is an apocalyptic number.

55577766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55577766 is a wasteful number, since it uses less digits than its factorization.

55577766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9262966.

The product of its digits is 1543500, while the sum is 48.

The square root of 55577766 is about 7455.0496980235. The cubic root of 55577766 is about 381.6222566338.

The spelling of 55577766 in words is "fifty-five million, five hundred seventy-seven thousand, seven hundred sixty-six".