65616545 has 8 divisors (see below), whose sum is σ = 78808680. Its totient is φ = 52447360.

The previous prime is 65616497. The next prime is 65616547. The reversal of 65616545 is 54561656.

It can be written as a sum of positive squares in 4 ways, for example, as 17272336 + 48344209 = 4156^2 + 6953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-65616545 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 65616499 and 65616508.

It is not an unprimeable number, because it can be changed into a prime (65616547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355 + ... + 11535.

It is an arithmetic number, because the mean of its divisors is an integer number (9851085).

Almost surely, 2^65616545 is an apocalyptic number.

It is an amenable number.

65616545 is a deficient number, since it is larger than the sum of its proper divisors (13192135).

65616545 is a wasteful number, since it uses less digits than its factorization.

65616545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11475.

The product of its digits is 108000, while the sum is 38.

The square root of 65616545 is about 8100.4040022705. The cubic root of 65616545 is about 403.3398381727.

The spelling of 65616545 in words is "sixty-five million, six hundred sixteen thousand, five hundred forty-five".