56666650 has 12 divisors (see below), whose sum is σ = 105400062. Its totient is φ = 22666640.

The previous prime is 56666579. The next prime is 56666653. The reversal of 56666650 is 5666665.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 54508689 + 2157961 = 7383^2 + 1469^2 .

It is a super-2 number, since 2×56666650² = 6422218444445000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56666653) 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 5 ways as a sum of consecutive naturals, for example, 566617 + ... + 566716.

Almost surely, 2^56666650 is an apocalyptic number.

56666650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56666650 is a deficient number, since it is larger than the sum of its proper divisors (48733412).

56666650 is a wasteful number, since it uses less digits than its factorization.

56666650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133345 (or 1133340 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 56666650 is about 7527.7254200721. The cubic root of 56666650 is about 384.0984131803.

The spelling of 56666650 in words is "fifty-six million, six hundred sixty-six thousand, six hundred fifty".