3661620913 has 8 divisors (see below), whose sum is σ = 3687710400. Its totient is φ = 3635551920.

The previous prime is 3661620847. The next prime is 3661620959. The reversal of 3661620913 is 3190261663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3661620913 - 2¹⁷ = 3661489841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3661623913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606556 + ... + 612562.

It is an arithmetic number, because the mean of its divisors is an integer number (460963800).

Almost surely, 2^3661620913 is an apocalyptic number.

It is an amenable number.

3661620913 is a deficient number, since it is larger than the sum of its proper divisors (26089487).

3661620913 is a wasteful number, since it uses less digits than its factorization.

3661620913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10247.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 3661620913 is about 60511.3287988291. The cubic root of 3661620913 is about 1541.3140121592.

The spelling of 3661620913 in words is "three billion, six hundred sixty-one million, six hundred twenty thousand, nine hundred thirteen".