2664561804507 has 30 divisors (see below), whose sum is σ = 4112936676684. Its totient is φ = 1719072081720.

The previous prime is 2664561804473. The next prime is 2664561804529. The reversal of 2664561804507 is 7054081654662.

2664561804507 is a `hidden beast` number, since 2 + 6 + 6 + 4 + 5 + 6 + 180 + 450 + 7 = 666.

It is not a de Polignac number, because 2664561804507 - 2¹⁰ = 2664561803483 is a prime.

It is a super-2 number, since 2×2664561804507² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2664561804547) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 17037573 + ... + 17193254.

Almost surely, 2^{2664561804507} is an apocalyptic number.

2664561804507 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2664561804507 is a deficient number, since it is larger than the sum of its proper divisors (1448374872177).

2664561804507 is an equidigital number, since it uses as much as digits as its factorization.

2664561804507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34230901 (or 34230861 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 2664561804507 in words is "two trillion, six hundred sixty-four billion, five hundred sixty-one million, eight hundred four thousand, five hundred seven".