7664791 has 2 divisors, whose sum is σ = 7664792. Its totient is φ = 7664790.

The previous prime is 7664753. The next prime is 7664803. The reversal of 7664791 is 1974667.

7664791 = T₂₂₅₉ + T₂₂₆₀ + T₂₂₆₁.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7664791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7667791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832395 + 3832396.

It is an arithmetic number, because the mean of its divisors is an integer number (3832396).

Almost surely, 2^7664791 is an apocalyptic number.

7664791 is the 2261-st centered triangular number.

7664791 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664791 is an equidigital number, since it uses as much as digits as its factorization.

7664791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 40.

The square root of 7664791 is about 2768.5358946562. The cubic root of 7664791 is about 197.1666416178.

The spelling of 7664791 in words is "seven million, six hundred sixty-four thousand, seven hundred ninety-one".