7664257 has 4 divisors (see below), whose sum is σ = 7704576. Its totient is φ = 7623940.

The previous prime is 7664249. The next prime is 7664273. The reversal of 7664257 is 7524667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7664257 - 2³ = 7664249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7664227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19873 + ... + 20254.

It is an arithmetic number, because the mean of its divisors is an integer number (1926144).

Almost surely, 2^7664257 is an apocalyptic number.

It is an amenable number.

7664257 is a deficient number, since it is larger than the sum of its proper divisors (40319).

7664257 is a wasteful number, since it uses less digits than its factorization.

7664257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40318.

The product of its digits is 70560, while the sum is 37.

The square root of 7664257 is about 2768.4394521102. The cubic root of 7664257 is about 197.1620626962.

It can be divided in two parts, 7664 and 257, that added together give a square (7921 = 89²).

The spelling of 7664257 in words is "seven million, six hundred sixty-four thousand, two hundred fifty-seven".