61000665105499 has 4 divisors (see below), whose sum is σ = 69715045834864. Its totient is φ = 52286284376136.

The previous prime is 61000665105467. The next prime is 61000665105521. The reversal of 61000665105499 is 99450156600016.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61000665105499 - 2⁵ = 61000665105467 is a prime.

It is a super-2 number, since 2×61000665105499² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61000665165499) 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, 4357190364672 + ... + 4357190364685.

It is an arithmetic number, because the mean of its divisors is an integer number (17428761458716).

Almost surely, 2^{61000665105499} is an apocalyptic number.

61000665105499 is a deficient number, since it is larger than the sum of its proper divisors (8714380729365).

61000665105499 is an equidigital number, since it uses as much as digits as its factorization.

61000665105499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8714380729364.

The product of its (nonzero) digits is 1749600, while the sum is 52.

The spelling of 61000665105499 in words is "sixty-one trillion, six hundred sixty-five million, one hundred five thousand, four hundred ninety-nine".