10661651560000 has 140 divisors (see below), whose sum is σ = 30214207458688. Its totient is φ = 3655423296000.

The previous prime is 10661651559947. The next prime is 10661651560003. The reversal of 10661651560000 is 6515616601.

It is a tau number, because it is divible by the number of its divisors (140).

It is a super-2 number, since 2×10661651560000² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10661651560003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18758664 + ... + 19318663.

Almost surely, 2^{10661651560000} is an apocalyptic number.

10661651560000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10661651560000 is an abundant number, since it is smaller than the sum of its proper divisors (19552555898688).

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

10661651560000 is an frugal number, since it uses more digits than its factorization.

10661651560000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38077366 (or 38077341 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 10661651560000 in words is "ten trillion, six hundred sixty-one billion, six hundred fifty-one million, five hundred sixty thousand".