87820166265 has 64 divisors (see below), whose sum is σ = 152003174400. Its totient is φ = 43040102400.

The previous prime is 87820166263. The next prime is 87820166267. The reversal of 87820166265 is 56266102878.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87820166263) and next prime (87820166267).

It is not a de Polignac number, because 87820166265 - 2¹ = 87820166263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87820166263) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76298440 + ... + 76299590.

It is an arithmetic number, because the mean of its divisors is an integer number (2375049600).

Almost surely, 2^87820166265 is an apocalyptic number.

It is an amenable number.

87820166265 is a deficient number, since it is larger than the sum of its proper divisors (64183008135).

87820166265 is a wasteful number, since it uses less digits than its factorization.

87820166265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 87820166265 in words is "eighty-seven billion, eight hundred twenty million, one hundred sixty-six thousand, two hundred sixty-five".