136520066 has 8 divisors (see below), whose sum is σ = 204939084. Its totient is φ = 68207040.

The previous prime is 136520053. The next prime is 136520099. The reversal of 136520066 is 660025631.

It can be written as a sum of positive squares in 2 ways, for example, as 93683041 + 42837025 = 9679^2 + 6545^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23195 + ... + 28478.

Almost surely, 2^136520066 is an apocalyptic number.

136520066 is a deficient number, since it is larger than the sum of its proper divisors (68419018).

136520066 is a wasteful number, since it uses less digits than its factorization.

136520066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52996.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 136520066 is about 11684.1801595148. The cubic root of 136520066 is about 514.9109922527.

Adding to 136520066 its reverse (660025631), we get a palindrome (796545697).

The spelling of 136520066 in words is "one hundred thirty-six million, five hundred twenty thousand, sixty-six".