56666898 has 16 divisors (see below), whose sum is σ = 125926560. Its totient is φ = 18888948.

The previous prime is 56666891. The next prime is 56666921. The reversal of 56666898 is 89866665.

It is a super-2 number, since 2×56666898² = 6422274657884808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1049387 = 56666898 / (5 + 6 + 6 + 6 + 6 + 8 + 9 + 8).

It is not an unprimeable number, because it can be changed into a prime (56666891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524640 + ... + 524747.

It is an arithmetic number, because the mean of its divisors is an integer number (7870410).

Almost surely, 2^56666898 is an apocalyptic number.

56666898 is an abundant number, since it is smaller than the sum of its proper divisors (69259662).

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

56666898 is a wasteful number, since it uses less digits than its factorization.

56666898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049398 (or 1049392 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 56666898 is about 7527.7418924934. The cubic root of 56666898 is about 384.0989735115.

The spelling of 56666898 in words is "fifty-six million, six hundred sixty-six thousand, eight hundred ninety-eight".