368721661 has 8 divisors (see below), whose sum is σ = 459705024. Its totient is φ = 287315520.

The previous prime is 368721659. The next prime is 368721701. The reversal of 368721661 is 166127863.

It is a happy number.

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 368721661 - 2¹ = 368721659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (368721611) 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, 2394220 + ... + 2394373.

It is an arithmetic number, because the mean of its divisors is an integer number (57463128).

Almost surely, 2^368721661 is an apocalyptic number.

It is an amenable number.

368721661 is a deficient number, since it is larger than the sum of its proper divisors (90983363).

368721661 is a wasteful number, since it uses less digits than its factorization.

368721661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4788611.

The product of its digits is 72576, while the sum is 40.

The square root of 368721661 is about 19202.1264707844. The cubic root of 368721661 is about 717.0777005623.

The spelling of 368721661 in words is "three hundred sixty-eight million, seven hundred twenty-one thousand, six hundred sixty-one".