3678660581 has 4 divisors (see below), whose sum is σ = 3682229664. Its totient is φ = 3675091500.

The previous prime is 3678660533. The next prime is 3678660611. The reversal of 3678660581 is 1850668763.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3678660581 - 2²² = 3674466277 is a prime.

It is a super-2 number, since 2×3678660581² = 27065087340406515122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3678663581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1782995 + ... + 1785056.

It is an arithmetic number, because the mean of its divisors is an integer number (920557416).

Almost surely, 2^3678660581 is an apocalyptic number.

It is an amenable number.

3678660581 is a deficient number, since it is larger than the sum of its proper divisors (3569083).

3678660581 is a wasteful number, since it uses less digits than its factorization.

3678660581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569082.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 3678660581 is about 60651.9627135017. The cubic root of 3678660581 is about 1543.7011921256.

The spelling of 3678660581 in words is "three billion, six hundred seventy-eight million, six hundred sixty thousand, five hundred eighty-one".