55997770 has 8 divisors (see below), whose sum is σ = 100796004. Its totient is φ = 22399104.

The previous prime is 55997741. The next prime is 55997797. The reversal of 55997770 is 7779955.

It can be written as a sum of positive squares in 2 ways, for example, as 55696369 + 301401 = 7463^2 + 549^2 .

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

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, 2799879 + ... + 2799898.

Almost surely, 2^55997770 is an apocalyptic number.

55997770 is a deficient number, since it is larger than the sum of its proper divisors (44798234).

55997770 is a wasteful number, since it uses less digits than its factorization.

55997770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599784.

The product of its (nonzero) digits is 694575, while the sum is 49.

The square root of 55997770 is about 7483.1657739222. The cubic root of 55997770 is about 382.5811581102.

The spelling of 55997770 in words is "fifty-five million, nine hundred ninety-seven thousand, seven hundred seventy".