66507064 has 16 divisors (see below), whose sum is σ = 134293320. Its totient is φ = 30695520.

The previous prime is 66507031. The next prime is 66507107. The reversal of 66507064 is 46070566.

It is a congruent number.

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, 319642 + ... + 319849.

Almost surely, 2^66507064 is an apocalyptic number.

It is an amenable number.

66507064 is an abundant number, since it is smaller than the sum of its proper divisors (67786256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66507064 is a wasteful number, since it uses less digits than its factorization.

66507064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639510 (or 639506 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 66507064 is about 8155.1863252779. The cubic root of 66507064 is about 405.1562959217.

The spelling of 66507064 in words is "sixty-six million, five hundred seven thousand, sixty-four".