61651151006660 has 24 divisors (see below), whose sum is σ = 131106245182080. Its totient is φ = 24348302675424.

The previous prime is 61651151006659. The next prime is 61651151006689. The reversal of 61651151006660 is 6660015115616.

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, 19509856334 + ... + 19509859493.

It is an arithmetic number, because the mean of its divisors is an integer number (5462760215920).

Almost surely, 2^{61651151006660} is an apocalyptic number.

It is an amenable number.

61651151006660 is an abundant number, since it is smaller than the sum of its proper divisors (69455094175420).

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

61651151006660 is a wasteful number, since it uses less digits than its factorization.

61651151006660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39019715915 (or 39019715913 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 61651151006660 in words is "sixty-one trillion, six hundred fifty-one billion, one hundred fifty-one million, six thousand, six hundred sixty".