2661520041630 has 48 divisors (see below), whose sum is σ = 6920420423904. Its totient is φ = 709690645440.

The previous prime is 2661520041581. The next prime is 2661520041637. The reversal of 2661520041630 is 361400251662.

2661520041630 is a `hidden beast` number, since 2 + 6 + 6 + 1 + 5 + 200 + 416 + 30 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661520041637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346600 + ... + 2333060.

It is an arithmetic number, because the mean of its divisors is an integer number (144175425498).

Almost surely, 2^{2661520041630} is an apocalyptic number.

2661520041630 is an abundant number, since it is smaller than the sum of its proper divisors (4258900382274).

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

2661520041630 is a wasteful number, since it uses less digits than its factorization.

2661520041630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001361 (or 2001358 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 2661520041630 in words is "two trillion, six hundred sixty-one billion, five hundred twenty million, forty-one thousand, six hundred thirty".