64680007 has 4 divisors (see below), whose sum is σ = 73920016. Its totient is φ = 55440000.

The previous prime is 64679999. The next prime is 64680017. The reversal of 64680007 is 70008646.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64680007 - 2³ = 64679999 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 (64680017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4619994 + ... + 4620007.

It is an arithmetic number, because the mean of its divisors is an integer number (18480004).

Almost surely, 2^64680007 is an apocalyptic number.

64680007 is a deficient number, since it is larger than the sum of its proper divisors (9240009).

64680007 is an equidigital number, since it uses as much as digits as its factorization.

64680007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9240008.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 64680007 is about 8042.3881403474. The cubic root of 64680007 is about 401.4116931947.

The spelling of 64680007 in words is "sixty-four million, six hundred eighty thousand, seven".