1220666630 has 32 divisors (see below), whose sum is σ = 2260663776. Its totient is φ = 474211584.

The previous prime is 1220666621. The next prime is 1220666639. The reversal of 1220666630 is 366660221.

It is an interprime number because it is at equal distance from previous prime (1220666621) and next prime (1220666639).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220666639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225617 + ... + 230963.

It is an arithmetic number, because the mean of its divisors is an integer number (70645743).

Almost surely, 2^1220666630 is an apocalyptic number.

1220666630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220666630 is a deficient number, since it is larger than the sum of its proper divisors (1039997146).

1220666630 is a wasteful number, since it uses less digits than its factorization.

1220666630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1220666630 is about 34938.0398706052. The cubic root of 1220666630 is about 1068.7243160158.

The spelling of 1220666630 in words is "one billion, two hundred twenty million, six hundred sixty-six thousand, six hundred thirty".