3662649213637 has 2 divisors, whose sum is σ = 3662649213638. Its totient is φ = 3662649213636.

The previous prime is 3662649213599. The next prime is 3662649213673. The reversal of 3662649213637 is 7363129462663.

It is a happy number.

3662649213637 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (3662649213673) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2079000631876 + 1583648581761 = 1441874^2 + 1258431^2 .

It is a cyclic number.

It is not a de Polignac number, because 3662649213637 - 2¹¹ = 3662649211589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3662649213037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1831324606818 + 1831324606819.

It is an arithmetic number, because the mean of its divisors is an integer number (1831324606819).

Almost surely, 2^{3662649213637} is an apocalyptic number.

It is an amenable number.

3662649213637 is a deficient number, since it is larger than the sum of its proper divisors (1).

3662649213637 is an equidigital number, since it uses as much as digits as its factorization.

3662649213637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 58.

The spelling of 3662649213637 in words is "three trillion, six hundred sixty-two billion, six hundred forty-nine million, two hundred thirteen thousand, six hundred thirty-seven".