1225566669 has 8 divisors (see below), whose sum is σ = 1730211840. Its totient is φ = 768982976.

The previous prime is 1225566659. The next prime is 1225566721. The reversal of 1225566669 is 9666655221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1225566669 - 2⁴ = 1225566653 is a prime.

It is a super-2 number, since 2×1225566669² = 3004027320327511122, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225566659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12015309 + ... + 12015410.

It is an arithmetic number, because the mean of its divisors is an integer number (216276480).

Almost surely, 2^1225566669 is an apocalyptic number.

It is an amenable number.

1225566669 is a deficient number, since it is larger than the sum of its proper divisors (504645171).

1225566669 is a wasteful number, since it uses less digits than its factorization.

1225566669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24030739.

The product of its digits is 1166400, while the sum is 48.

The square root of 1225566669 is about 35008.0943354533. The cubic root of 1225566669 is about 1070.1524425423.

The spelling of 1225566669 in words is "one billion, two hundred twenty-five million, five hundred sixty-six thousand, six hundred sixty-nine".