66320007 has 8 divisors (see below), whose sum is σ = 95228784. Its totient is φ = 40812288.

The previous prime is 66319999. The next prime is 66320027. The reversal of 66320007 is 70002366.

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

It is not a de Polignac number, because 66320007 - 2³ = 66319999 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66320027) 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, 850218 + ... + 850295.

It is an arithmetic number, because the mean of its divisors is an integer number (11903598).

Almost surely, 2^66320007 is an apocalyptic number.

66320007 is a deficient number, since it is larger than the sum of its proper divisors (28908777).

66320007 is a wasteful number, since it uses less digits than its factorization.

66320007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700529.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 66320007 is about 8143.7096583805. The cubic root of 66320007 is about 404.7760932747.

The spelling of 66320007 in words is "sixty-six million, three hundred twenty thousand, seven".