261102066 has 16 divisors (see below), whose sum is σ = 549688800. Its totient is φ = 82453248.

The previous prime is 261102053. The next prime is 261102067. The reversal of 261102066 is 660201162.

261102066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261102067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1145071 + ... + 1145298.

It is an arithmetic number, because the mean of its divisors is an integer number (34355550).

Almost surely, 2^261102066 is an apocalyptic number.

261102066 is an abundant number, since it is smaller than the sum of its proper divisors (288586734).

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

261102066 is a wasteful number, since it uses less digits than its factorization.

261102066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290393.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 261102066 is about 16158.6529760373. The cubic root of 261102066 is about 639.1509460435.

The spelling of 261102066 in words is "two hundred sixty-one million, one hundred two thousand, sixty-six".