66520414 has 16 divisors (see below), whose sum is σ = 101582208. Its totient is φ = 32662872.

The previous prime is 66520381. The next prime is 66520417. The reversal of 66520414 is 41402566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66520417) 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, 62047 + ... + 63109.

It is an arithmetic number, because the mean of its divisors is an integer number (6348888).

Almost surely, 2^66520414 is an apocalyptic number.

66520414 is a deficient number, since it is larger than the sum of its proper divisors (35061794).

66520414 is a wasteful number, since it uses less digits than its factorization.

66520414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 66520414 is about 8156.0047817544. The cubic root of 66520414 is about 405.1834031910.

The spelling of 66520414 in words is "sixty-six million, five hundred twenty thousand, four hundred fourteen".