3661751321 has 8 divisors (see below), whose sum is σ = 3719388000. Its totient is φ = 3604316832.

The previous prime is 3661751309. The next prime is 3661751333. The reversal of 3661751321 is 1231571663.

It is an interprime number because it is at equal distance from previous prime (3661751309) and next prime (3661751333).

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 3661751321 - 2²² = 3657557017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3661751021) 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, 13835 + ... + 86688.

It is an arithmetic number, because the mean of its divisors is an integer number (464923500).

Almost surely, 2^3661751321 is an apocalyptic number.

It is an amenable number.

3661751321 is a deficient number, since it is larger than the sum of its proper divisors (57636679).

3661751321 is a wasteful number, since it uses less digits than its factorization.

3661751321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101095.

The product of its digits is 22680, while the sum is 35.

The square root of 3661751321 is about 60512.4063395268. The cubic root of 3661751321 is about 1541.3323098199.

The spelling of 3661751321 in words is "three billion, six hundred sixty-one million, seven hundred fifty-one thousand, three hundred twenty-one".