5566661601 has 8 divisors (see below), whose sum is σ = 7466660544. Its totient is φ = 3688885200.

The previous prime is 5566661557. The next prime is 5566661627. The reversal of 5566661601 is 1061666655.

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

It is not a de Polignac number, because 5566661601 - 2²² = 5562467297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5566661651) 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, 5555050 + ... + 5556051.

It is an arithmetic number, because the mean of its divisors is an integer number (933332568).

Almost surely, 2^5566661601 is an apocalyptic number.

It is an amenable number.

5566661601 is a deficient number, since it is larger than the sum of its proper divisors (1899998943).

5566661601 is a wasteful number, since it uses less digits than its factorization.

5566661601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111271.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 5566661601 is about 74610.0636710625. The cubic root of 5566661601 is about 1772.2770231758.

The spelling of 5566661601 in words is "five billion, five hundred sixty-six million, six hundred sixty-one thousand, six hundred one".