27660226725 has 36 divisors (see below), whose sum is σ = 49748207652. Its totient is φ = 14690880000.

The previous prime is 27660226697. The next prime is 27660226751. The reversal of 27660226725 is 52762206672.

It can be written as a sum of positive squares in 6 ways, for example, as 1752427044 + 25907799681 = 41862^2 + 160959^2 .

It is not a de Polignac number, because 27660226725 - 2⁶ = 27660226661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 200826 + ... + 309275.

It is an arithmetic number, because the mean of its divisors is an integer number (1381894657).

Almost surely, 2^27660226725 is an apocalyptic number.

27660226725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27660226725 is a deficient number, since it is larger than the sum of its proper divisors (22087980927).

27660226725 is a wasteful number, since it uses less digits than its factorization.

27660226725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510358 (or 510350 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 27660226725 in words is "twenty-seven billion, six hundred sixty million, two hundred twenty-six thousand, seven hundred twenty-five".