3672661 has 2 divisors, whose sum is σ = 3672662. Its totient is φ = 3672660.

The previous prime is 3672659. The next prime is 3672677. The reversal of 3672661 is 1662763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3348900 + 323761 = 1830^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 3672661 - 2¹ = 3672659 is a prime.

Together with 3672659, it forms a pair of twin primes.

3672661 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3672611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1836330 + 1836331.

It is an arithmetic number, because the mean of its divisors is an integer number (1836331).

Almost surely, 2^3672661 is an apocalyptic number.

It is an amenable number.

3672661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3672661 is an equidigital number, since it uses as much as digits as its factorization.

3672661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 3672661 is about 1916.4187955664. The cubic root of 3672661 is about 154.2861520580.

The spelling of 3672661 in words is "three million, six hundred seventy-two thousand, six hundred sixty-one".