5661401001 has 4 divisors (see below), whose sum is σ = 7548534672. Its totient is φ = 3774267332.

The previous prime is 5661400993. The next prime is 5661401029. The reversal of 5661401001 is 1001041665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5661401001 - 2³ = 5661400993 is a prime.

It is a super-2 number, since 2×5661401001² = 64102922588247604002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5661401051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943566831 + ... + 943566836.

It is an arithmetic number, because the mean of its divisors is an integer number (1887133668).

Almost surely, 2^5661401001 is an apocalyptic number.

It is an amenable number.

5661401001 is a deficient number, since it is larger than the sum of its proper divisors (1887133671).

5661401001 is a wasteful number, since it uses less digits than its factorization.

5661401001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887133670.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 5661401001 is about 75242.2820028739. The cubic root of 5661401001 is about 1782.2746874329.

Adding to 5661401001 its reverse (1001041665), we get a palindrome (6662442666).

The spelling of 5661401001 in words is "five billion, six hundred sixty-one million, four hundred one thousand, one".