5651661007 has 2 divisors, whose sum is σ = 5651661008. Its totient is φ = 5651661006.

The previous prime is 5651660981. The next prime is 5651661061. The reversal of 5651661007 is 7001661565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5651661007 - 2¹⁵ = 5651628239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5651661077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2825830503 + 2825830504.

It is an arithmetic number, because the mean of its divisors is an integer number (2825830504).

Almost surely, 2^5651661007 is an apocalyptic number.

5651661007 is a deficient number, since it is larger than the sum of its proper divisors (1).

5651661007 is an equidigital number, since it uses as much as digits as its factorization.

5651661007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 5651661007 is about 75177.5299341499. The cubic root of 5651661007 is about 1781.2520130446.

The spelling of 5651661007 in words is "five billion, six hundred fifty-one million, six hundred sixty-one thousand, seven".