65661551561614 has 4 divisors (see below), whose sum is σ = 98492327342424. Its totient is φ = 32830775780806.

The previous prime is 65661551561609. The next prime is 65661551561647. The reversal of 65661551561614 is 41616515516656.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×65661551561614² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16415387890402 + ... + 16415387890405.

It is an arithmetic number, because the mean of its divisors is an integer number (24623081835606).

Almost surely, 2^{65661551561614} is an apocalyptic number.

65661551561614 is a deficient number, since it is larger than the sum of its proper divisors (32830775780810).

65661551561614 is a wasteful number, since it uses less digits than its factorization.

65661551561614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32830775780809.

The product of its digits is 19440000, while the sum is 58.

The spelling of 65661551561614 in words is "sixty-five trillion, six hundred sixty-one billion, five hundred fifty-one million, five hundred sixty-one thousand, six hundred fourteen".