71665230 has 64 divisors (see below), whose sum is σ = 211696128. Its totient is φ = 15120000.

The previous prime is 71665229. The next prime is 71665241. The reversal of 71665230 is 3256617.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10396 + ... + 15855.

It is an arithmetic number, because the mean of its divisors is an integer number (3307752).

Almost surely, 2^71665230 is an apocalyptic number.

71665230 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71665230 is an abundant number, since it is smaller than the sum of its proper divisors (140030898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71665230 is a wasteful number, since it uses less digits than its factorization.

71665230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26281.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 71665230 is about 8465.5318793328. The cubic root of 71665230 is about 415.3709945148.

The spelling of 71665230 in words is "seventy-one million, six hundred sixty-five thousand, two hundred thirty".