7664217 has 16 divisors (see below), whose sum is σ = 11451072. Its totient is φ = 4518720.

The previous prime is 7664203. The next prime is 7664219. The reversal of 7664217 is 7124667.

It is not a de Polignac number, because 7664217 - 2¹⁰ = 7663193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

7664217 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7664219) 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 15 ways as a sum of consecutive naturals, for example, 1918 + ... + 4359.

It is an arithmetic number, because the mean of its divisors is an integer number (715692).

Almost surely, 2^7664217 is an apocalyptic number.

It is an amenable number.

7664217 is a deficient number, since it is larger than the sum of its proper divisors (3786855).

7664217 is a wasteful number, since it uses less digits than its factorization.

7664217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6328.

The product of its digits is 14112, while the sum is 33.

The square root of 7664217 is about 2768.4322278141. The cubic root of 7664217 is about 197.1617196973.

The spelling of 7664217 in words is "seven million, six hundred sixty-four thousand, two hundred seventeen".