661203300 has 36 divisors (see below), whose sum is σ = 1913082416. Its totient is φ = 176320800.

The previous prime is 661203293. The next prime is 661203307. The reversal of 661203300 is 3302166.

It is an interprime number because it is at equal distance from previous prime (661203293) and next prime (661203307).

It is not an unprimeable number, because it can be changed into a prime (661203307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1101706 + ... + 1102305.

Almost surely, 2^661203300 is an apocalyptic number.

661203300 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

661203300 is an abundant number, since it is smaller than the sum of its proper divisors (1251879116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661203300 is a wasteful number, since it uses less digits than its factorization.

661203300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204028 (or 2204021 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 661203300 is about 25713.8736871752. The cubic root of 661203300 is about 871.1875709594.

Adding to 661203300 its reverse (3302166), we get a palindrome (664505466).

The spelling of 661203300 in words is "six hundred sixty-one million, two hundred three thousand, three hundred".