661334411516 has 12 divisors (see below), whose sum is σ = 1157381838480. Its totient is φ = 330653886240.

The previous prime is 661334411513. The next prime is 661334411527. The reversal of 661334411516 is 615114433166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661334411513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3217745 + ... + 3417096.

It is an arithmetic number, because the mean of its divisors is an integer number (96448486540).

Almost surely, 2^661334411516 is an apocalyptic number.

It is an amenable number.

661334411516 is a deficient number, since it is larger than the sum of its proper divisors (496047426964).

661334411516 is a wasteful number, since it uses less digits than its factorization.

661334411516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659764 (or 6659762 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The spelling of 661334411516 in words is "six hundred sixty-one billion, three hundred thirty-four million, four hundred eleven thousand, five hundred sixteen".