261166300 has 18 divisors (see below), whose sum is σ = 566731088. Its totient is φ = 104466480.

The previous prime is 261166277. The next prime is 261166303. The reversal of 261166300 is 3661162.

261166300 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261166303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1305732 + ... + 1305931.

Almost surely, 2^261166300 is an apocalyptic number.

261166300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261166300 is an abundant number, since it is smaller than the sum of its proper divisors (305564788).

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

261166300 is a wasteful number, since it uses less digits than its factorization.

261166300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611677 (or 2611670 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 261166300 is about 16160.6404576056. The cubic root of 261166300 is about 639.2033544832.

The spelling of 261166300 in words is "two hundred sixty-one million, one hundred sixty-six thousand, three hundred".