105061665656505 has 32 divisors (see below), whose sum is σ = 168495132355200. Its totient is φ = 55900850765312.

The previous prime is 105061665656503. The next prime is 105061665656527. The reversal of 105061665656505 is 505656566160501.

It is a cyclic number.

It is not a de Polignac number, because 105061665656505 - 2¹ = 105061665656503 is a prime.

It is a super-2 number, since 2×105061665656505² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105061665656503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10535731 + ... + 17919959.

It is an arithmetic number, because the mean of its divisors is an integer number (5265472886100).

Almost surely, 2^{105061665656505} is an apocalyptic number.

105061665656505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

105061665656505 is a deficient number, since it is larger than the sum of its proper divisors (63433466698695).

105061665656505 is a wasteful number, since it uses less digits than its factorization.

105061665656505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7386473.

The product of its (nonzero) digits is 24300000, while the sum is 57.

The spelling of 105061665656505 in words is "one hundred five trillion, sixty-one billion, six hundred sixty-five million, six hundred fifty-six thousand, five hundred five".