2661335031516 has 24 divisors (see below), whose sum is σ = 7096893417600. Its totient is φ = 760381437552.

The previous prime is 2661335031473. The next prime is 2661335031539. The reversal of 2661335031516 is 6151305331662.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15841279866 + ... + 15841280033.

It is an arithmetic number, because the mean of its divisors is an integer number (295703892400).

Almost surely, 2^{2661335031516} is an apocalyptic number.

It is an amenable number.

2661335031516 is an abundant number, since it is smaller than the sum of its proper divisors (4435558386084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661335031516 is a wasteful number, since it uses less digits than its factorization.

2661335031516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31682559913 (or 31682559911 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 42.

The spelling of 2661335031516 in words is "two trillion, six hundred sixty-one billion, three hundred thirty-five million, thirty-one thousand, five hundred sixteen".