665147226451 has 2 divisors, whose sum is σ = 665147226452. Its totient is φ = 665147226450.

The previous prime is 665147226437. The next prime is 665147226551. The reversal of 665147226451 is 154622741566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665147226451 - 2⁷ = 665147226323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665147226395 and 665147226404.

It is not a weakly prime, because it can be changed into another prime (665147226431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332573613225 + 332573613226.

It is an arithmetic number, because the mean of its divisors is an integer number (332573613226).

Almost surely, 2^665147226451 is an apocalyptic number.

665147226451 is a deficient number, since it is larger than the sum of its proper divisors (1).

665147226451 is an equidigital number, since it uses as much as digits as its factorization.

665147226451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 49.

The spelling of 665147226451 in words is "six hundred sixty-five billion, one hundred forty-seven million, two hundred twenty-six thousand, four hundred fifty-one".