1661723230 has 16 divisors (see below), whose sum is σ = 3007815120. Its totient is φ = 660975232.

The previous prime is 1661723227. The next prime is 1661723281. The reversal of 1661723230 is 323271661.

It is a super-2 number, since 2×1661723230² = 5522648186243265800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1661723192 and 1661723201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462379 + ... + 465958.

It is an arithmetic number, because the mean of its divisors is an integer number (187988445).

Almost surely, 2^1661723230 is an apocalyptic number.

1661723230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661723230 is a deficient number, since it is larger than the sum of its proper divisors (1346091890).

1661723230 is a wasteful number, since it uses less digits than its factorization.

1661723230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928523.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 1661723230 is about 40764.2395979613. The cubic root of 1661723230 is about 1184.4577221736.

Adding to 1661723230 its reverse (323271661), we get a palindrome (1984994891).

The spelling of 1661723230 in words is "one billion, six hundred sixty-one million, seven hundred twenty-three thousand, two hundred thirty".