7866803025 has 99 divisors (see below), whose sum is σ = 14835357489. Its totient is φ = 4138153920.

The previous prime is 7866802981. The next prime is 7866803029. The reversal of 7866803025 is 5203086687.

The square root of 7866803025 is 88695.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 43046721 + 7823756304 = 6561^2 + 88452^2 .

It is not a de Polignac number, because 7866803025 - 2¹³ = 7866794833 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (7866803029) by changing a digit.

It is a polite number, since it can be written in 98 ways as a sum of consecutive naturals, for example, 107764389 + ... + 107764461.

Almost surely, 2^7866803025 is an apocalyptic number.

7866803025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7866803025 is the 88695-th square number.

7866803025 is the 44348-th centered octagonal number.

It is an amenable number.

7866803025 is a deficient number, since it is larger than the sum of its proper divisors (6968554464).

7866803025 is an frugal number, since it uses more digits than its factorization.

7866803025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The cubic root of 7866803025 is about 1988.8380736710.

The spelling of 7866803025 in words is "seven billion, eight hundred sixty-six million, eight hundred three thousand, twenty-five".