1220663807 has 8 divisors (see below), whose sum is σ = 1334351232. Its totient is φ = 1107429400.

The previous prime is 1220663789. The next prime is 1220663813. The reversal of 1220663807 is 7083660221.

It is a happy number.

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

It is not a de Polignac number, because 1220663807 - 2¹⁴ = 1220647423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220663827) 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, 107603 + ... + 118404.

It is an arithmetic number, because the mean of its divisors is an integer number (166793904).

Almost surely, 2^1220663807 is an apocalyptic number.

1220663807 is a deficient number, since it is larger than the sum of its proper divisors (113687425).

1220663807 is a wasteful number, since it uses less digits than its factorization.

1220663807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226509.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 1220663807 is about 34937.9994704906. Note that the first 3 decimals coincide. The cubic root of 1220663807 is about 1068.7234921460.

The spelling of 1220663807 in words is "one billion, two hundred twenty million, six hundred sixty-three thousand, eight hundred seven".