1661420230 has 16 divisors (see below), whose sum is σ = 3147954480. Its totient is φ = 629590752.

The previous prime is 1661420221. The next prime is 1661420263. The reversal of 1661420230 is 320241661.

It is a junction number, because it is equal to n+sod(n) for n = 1661420195 and 1661420204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4371969 + ... + 4372348.

It is an arithmetic number, because the mean of its divisors is an integer number (196747155).

Almost surely, 2^1661420230 is an apocalyptic number.

1661420230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661420230 is a deficient number, since it is larger than the sum of its proper divisors (1486534250).

1661420230 is a wasteful number, since it uses less digits than its factorization.

1661420230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8744343.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1661420230 is about 40760.5229358015. The cubic root of 1661420230 is about 1184.3857261277.

Adding to 1661420230 its reverse (320241661), we get a palindrome (1981661891).

The spelling of 1661420230 in words is "one billion, six hundred sixty-one million, four hundred twenty thousand, two hundred thirty".