2661491484 has 36 divisors (see below), whose sum is σ = 6944683200. Its totient is φ = 858545280.

The previous prime is 2661491479. The next prime is 2661491489. The reversal of 2661491484 is 4841941662.

2661491484 is a `hidden beast` number, since 26 + 6 + 149 + 1 + 484 = 666.

It is an interprime number because it is at equal distance from previous prime (2661491479) and next prime (2661491489).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661491489) 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, 1191309 + ... + 1193540.

Almost surely, 2^2661491484 is an apocalyptic number.

It is an amenable number.

2661491484 is an abundant number, since it is smaller than the sum of its proper divisors (4283191716).

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

2661491484 is a wasteful number, since it uses less digits than its factorization.

2661491484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384890 (or 2384885 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 2661491484 is about 51589.6451238037. The cubic root of 2661491484 is about 1385.8248999514.

The spelling of 2661491484 in words is "two billion, six hundred sixty-one million, four hundred ninety-one thousand, four hundred eighty-four".