66513007 has 8 divisors (see below), whose sum is σ = 72766080. Its totient is φ = 60294360.

The previous prime is 66512989. The next prime is 66513017. The reversal of 66513007 is 70031566.

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

It is a cyclic number.

It is not a de Polignac number, because 66513007 - 2¹¹ = 66510959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66513017) 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, 4473 + ... + 12370.

It is an arithmetic number, because the mean of its divisors is an integer number (9095760).

Almost surely, 2^66513007 is an apocalyptic number.

66513007 is a deficient number, since it is larger than the sum of its proper divisors (6253073).

66513007 is a wasteful number, since it uses less digits than its factorization.

66513007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17213.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 66513007 is about 8155.5506864957. The cubic root of 66513007 is about 405.1683636731.

The spelling of 66513007 in words is "sixty-six million, five hundred thirteen thousand, seven".