7664213251 has 2 divisors, whose sum is σ = 7664213252. Its totient is φ = 7664213250.

The previous prime is 7664213243. The next prime is 7664213257. The reversal of 7664213251 is 1523124667.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7664213251 - 2³ = 7664213243 is a prime.

It is a super-3 number, since 3×7664213251³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7664213251.

It is not a weakly prime, because it can be changed into another prime (7664213257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832106625 + 3832106626.

It is an arithmetic number, because the mean of its divisors is an integer number (3832106626).

Almost surely, 2^7664213251 is an apocalyptic number.

7664213251 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664213251 is an equidigital number, since it uses as much as digits as its factorization.

7664213251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 7664213251 is about 87545.4924653463. The cubic root of 7664213251 is about 1971.6168754963.

The spelling of 7664213251 in words is "seven billion, six hundred sixty-four million, two hundred thirteen thousand, two hundred fifty-one".