2661000365 has 16 divisors (see below), whose sum is σ = 3242947968. Its totient is φ = 2095876416.

The previous prime is 2661000343. The next prime is 2661000389. The reversal of 2661000365 is 5630001662.

It is a cyclic number.

It is not a de Polignac number, because 2661000365 - 2⁸ = 2661000109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74162 + ... + 104028.

It is an arithmetic number, because the mean of its divisors is an integer number (202684248).

Almost surely, 2^2661000365 is an apocalyptic number.

It is an amenable number.

2661000365 is a deficient number, since it is larger than the sum of its proper divisors (581947603).

2661000365 is a wasteful number, since it uses less digits than its factorization.

2661000365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30148.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2661000365 is about 51584.8850439739. The cubic root of 2661000365 is about 1385.7396536636.

The spelling of 2661000365 in words is "two billion, six hundred sixty-one million, three hundred sixty-five", and thus it is an aban number.