1220661069 has 8 divisors (see below), whose sum is σ = 1683670560. Its totient is φ = 785712816.

The previous prime is 1220661067. The next prime is 1220661103. The reversal of 1220661069 is 9601660221.

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

It is not a de Polignac number, because 1220661069 - 2¹ = 1220661067 is a prime.

It is a super-2 number, since 2×1220661069² = 2980026890744445522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220661067) 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, 7015207 + ... + 7015380.

It is an arithmetic number, because the mean of its divisors is an integer number (210458820).

Almost surely, 2^1220661069 is an apocalyptic number.

It is an amenable number.

1220661069 is a deficient number, since it is larger than the sum of its proper divisors (463009491).

1220661069 is a wasteful number, since it uses less digits than its factorization.

1220661069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14030619.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1220661069 is about 34937.9602867712. The cubic root of 1220661069 is about 1068.7226930816.

The spelling of 1220661069 in words is "one billion, two hundred twenty million, six hundred sixty-one thousand, sixty-nine".