66520346 has 8 divisors (see below), whose sum is σ = 99917760. Its totient is φ = 33214428.

The previous prime is 66520331. The next prime is 66520351. The reversal of 66520346 is 64302566.

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, 21026 + ... + 23981.

It is an arithmetic number, because the mean of its divisors is an integer number (12489720).

Almost surely, 2^66520346 is an apocalyptic number.

66520346 is a deficient number, since it is larger than the sum of its proper divisors (33397414).

66520346 is a wasteful number, since it uses less digits than its factorization.

66520346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45748.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 66520346 is about 8156.0006130456. Note that the first 3 decimals coincide. The cubic root of 66520346 is about 405.1832651257.

It can be divided in two parts, 66520 and 346, that added together give a palindrome (66866).

The spelling of 66520346 in words is "sixty-six million, five hundred twenty thousand, three hundred forty-six".