616761065 has 4 divisors (see below), whose sum is σ = 740113284. Its totient is φ = 493408848.

The previous prime is 616761023. The next prime is 616761091. The reversal of 616761065 is 560167616.

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

It can be written as a sum of positive squares in 2 ways, for example, as 247621696 + 369139369 = 15736^2 + 19213^2 .

It is a cyclic number.

It is not a de Polignac number, because 616761065 - 2⁶ = 616761001 is a prime.

It is a super-2 number, since 2×616761065² = 760788422599868450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61676102 + ... + 61676111.

It is an arithmetic number, because the mean of its divisors is an integer number (185028321).

Almost surely, 2^616761065 is an apocalyptic number.

It is an amenable number.

616761065 is a deficient number, since it is larger than the sum of its proper divisors (123352219).

616761065 is a wasteful number, since it uses less digits than its factorization.

616761065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123352218.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 616761065 is about 24834.6746505768. The cubic root of 616761065 is about 851.2144416582.

The spelling of 616761065 in words is "six hundred sixteen million, seven hundred sixty-one thousand, sixty-five".