5625041661 has 36 divisors (see below), whose sum is σ = 8457758400. Its totient is φ = 3601866528.

The previous prime is 5625041657. The next prime is 5625041677. The reversal of 5625041661 is 1661405265.

5625041661 is a `hidden beast` number, since 562 + 50 + 41 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 5625041661 - 2² = 5625041657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5625043661) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 970470 + ... + 976248.

Almost surely, 2^5625041661 is an apocalyptic number.

It is an amenable number.

5625041661 is a deficient number, since it is larger than the sum of its proper divisors (2832716739).

5625041661 is a wasteful number, since it uses less digits than its factorization.

5625041661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5938 (or 5898 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 5625041661 is about 75000.2777394857. The cubic root of 5625041661 is about 1778.4510428633.

The spelling of 5625041661 in words is "five billion, six hundred twenty-five million, forty-one thousand, six hundred sixty-one".