7664667 has 8 divisors (see below), whose sum is σ = 10232640. Its totient is φ = 5103240.

The previous prime is 7664653. The next prime is 7664669.

7664667 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 7664667 - 2⁴ = 7664651 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

7664667 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7664669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2884 + ... + 4862.

It is an arithmetic number, because the mean of its divisors is an integer number (1279080).

Almost surely, 2^7664667 is an apocalyptic number.

7664667 is a deficient number, since it is larger than the sum of its proper divisors (2567973).

7664667 is a wasteful number, since it uses less digits than its factorization.

7664667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273.

The product of its digits is 254016, while the sum is 42.

The square root of 7664667 is about 2768.5135000574. The cubic root of 7664667 is about 197.1655783666.

The spelling of 7664667 in words is "seven million, six hundred sixty-four thousand, six hundred sixty-seven".