1226635667 has 2 divisors, whose sum is σ = 1226635668. Its totient is φ = 1226635666.

The previous prime is 1226635637. The next prime is 1226635691. The reversal of 1226635667 is 7665366221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1226635667 - 2⁸ = 1226635411 is a prime.

It is a super-3 number, since 3×1226635667³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1226635637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613317833 + 613317834.

It is an arithmetic number, because the mean of its divisors is an integer number (613317834).

Almost surely, 2^1226635667 is an apocalyptic number.

1226635667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226635667 is an equidigital number, since it uses as much as digits as its factorization.

1226635667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 44.

The square root of 1226635667 is about 35023.3588766126. The cubic root of 1226635667 is about 1070.4634982078.

The spelling of 1226635667 in words is "one billion, two hundred twenty-six million, six hundred thirty-five thousand, six hundred sixty-seven".