3661257871 has 2 divisors, whose sum is σ = 3661257872. Its totient is φ = 3661257870.

The previous prime is 3661257857. The next prime is 3661257907. The reversal of 3661257871 is 1787521663.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3661257871 - 2¹¹ = 3661255823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661207871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830628935 + 1830628936.

It is an arithmetic number, because the mean of its divisors is an integer number (1830628936).

Almost surely, 2^3661257871 is an apocalyptic number.

3661257871 is the 34935-th hex number.

3661257871 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661257871 is an equidigital number, since it uses as much as digits as its factorization.

3661257871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 3661257871 is about 60508.3289390808. The cubic root of 3661257871 is about 1541.2630711298.

The spelling of 3661257871 in words is "three billion, six hundred sixty-one million, two hundred fifty-seven thousand, eight hundred seventy-one".