1226660671 has 4 divisors (see below), whose sum is σ = 1226754144. Its totient is φ = 1226567200.

The previous prime is 1226660657. The next prime is 1226660689. The reversal of 1226660671 is 1760666221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1226660671 - 2¹⁷ = 1226529599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1226660671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226660641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23050 + ... + 54631.

It is an arithmetic number, because the mean of its divisors is an integer number (306688536).

Almost surely, 2^1226660671 is an apocalyptic number.

1226660671 is a deficient number, since it is larger than the sum of its proper divisors (93473).

1226660671 is an equidigital number, since it uses as much as digits as its factorization.

1226660671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93472.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1226660671 is about 35023.7158365585. The cubic root of 1226660671 is about 1070.4707716762.

The spelling of 1226660671 in words is "one billion, two hundred twenty-six million, six hundred sixty thousand, six hundred seventy-one".