3661330237921 has 12 divisors (see below), whose sum is σ = 3722202716652. Its totient is φ = 3601258596864.

The previous prime is 3661330237771. The next prime is 3661330237933. The reversal of 3661330237921 is 1297320331663.

It can be written as a sum of positive squares in 6 ways, for example, as 88137734400 + 3573192503521 = 296880^2 + 1890289^2 .

It is not a de Polignac number, because 3661330237921 - 2¹³ = 3661330229729 is a prime.

It is a super-2 number, since 2×3661330237921² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3661330237421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 503001 + ... + 2752393.

It is an arithmetic number, because the mean of its divisors is an integer number (310183559721).

Almost surely, 2^{3661330237921} is an apocalyptic number.

It is an amenable number.

3661330237921 is a deficient number, since it is larger than the sum of its proper divisors (60872478731).

3661330237921 is a wasteful number, since it uses less digits than its factorization.

3661330237921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249748 (or 2249639 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 46.

The spelling of 3661330237921 in words is "three trillion, six hundred sixty-one billion, three hundred thirty million, two hundred thirty-seven thousand, nine hundred twenty-one".