7664407 has 2 divisors, whose sum is σ = 7664408. Its totient is φ = 7664406.

The previous prime is 7664369. The next prime is 7664453. The reversal of 7664407 is 7044667.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7664407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7664477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832203 + 3832204.

It is an arithmetic number, because the mean of its divisors is an integer number (3832204).

Almost surely, 2^7664407 is an apocalyptic number.

7664407 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664407 is an equidigital number, since it uses as much as digits as its factorization.

7664407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 7664407 is about 2768.4665430523. The cubic root of 7664407 is about 197.1633489316.

The spelling of 7664407 in words is "seven million, six hundred sixty-four thousand, four hundred seven".