86766725 has 24 divisors (see below), whose sum is σ = 115026120. Its totient is φ = 64696320.

The previous prime is 86766721. The next prime is 86766761. The reversal of 86766725 is 52766768.

It can be written as a sum of positive squares in 12 ways, for example, as 27384289 + 59382436 = 5233^2 + 7706^2 .

It is not a de Polignac number, because 86766725 - 2² = 86766721 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 86766725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86766721) 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, 45389 + ... + 47261.

It is an arithmetic number, because the mean of its divisors is an integer number (4792755).

Almost surely, 2^86766725 is an apocalyptic number.

86766725 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

86766725 is a deficient number, since it is larger than the sum of its proper divisors (28259395).

86766725 is a wasteful number, since it uses less digits than its factorization.

86766725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009 (or 2004 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The square root of 86766725 is about 9314.8658068702. The cubic root of 86766725 is about 442.7083721830.

The spelling of 86766725 in words is "eighty-six million, seven hundred sixty-six thousand, seven hundred twenty-five".