2166004507604 has 24 divisors (see below), whose sum is σ = 4340690424000. Its totient is φ = 926427344256.

The previous prime is 2166004507591. The next prime is 2166004507649. The reversal of 2166004507604 is 4067054006612.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77498357 + ... + 77526300.

It is an arithmetic number, because the mean of its divisors is an integer number (180862101000).

Almost surely, 2^{2166004507604} is an apocalyptic number.

It is an amenable number.

2166004507604 is an abundant number, since it is smaller than the sum of its proper divisors (2174685916396).

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

2166004507604 is a wasteful number, since it uses less digits than its factorization.

2166004507604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155025167 (or 155025165 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 2166004507604 in words is "two trillion, one hundred sixty-six billion, four million, five hundred seven thousand, six hundred four".