3658373661 has 4 divisors (see below), whose sum is σ = 4877831552. Its totient is φ = 2438915772.

The previous prime is 3658373657. The next prime is 3658373671. The reversal of 3658373661 is 1663738563.

3658373661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1663738563 = 3 ⋅554579521.

It is not a de Polignac number, because 3658373661 - 2² = 3658373657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3658373661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3658373671) 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, 609728941 + ... + 609728946.

It is an arithmetic number, because the mean of its divisors is an integer number (1219457888).

Almost surely, 2^3658373661 is an apocalyptic number.

It is an amenable number.

3658373661 is a deficient number, since it is larger than the sum of its proper divisors (1219457891).

3658373661 is a wasteful number, since it uses less digits than its factorization.

3658373661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219457890.

The product of its digits is 1632960, while the sum is 48.

The square root of 3658373661 is about 60484.4910782921. The cubic root of 3658373661 is about 1540.8582472213.

The spelling of 3658373661 in words is "three billion, six hundred fifty-eight million, three hundred seventy-three thousand, six hundred sixty-one".