71663364 has 72 divisors (see below), whose sum is σ = 201932640. Its totient is φ = 21295872.

The previous prime is 71663341. The next prime is 71663429. The reversal of 71663364 is 46336617.

It is a happy number.

71663364 is a `hidden beast` number, since 7 + 16 + 633 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8547 + ... + 14709.

It is an arithmetic number, because the mean of its divisors is an integer number (2804620).

Almost surely, 2^71663364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71663364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100966320).

71663364 is an abundant number, since it is smaller than the sum of its proper divisors (130269276).

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

71663364 is a wasteful number, since it uses less digits than its factorization.

71663364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209 (or 6204 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 71663364 is about 8465.4216669933. The cubic root of 71663364 is about 415.3673893774.

It can be divided in two parts, 71663 and 364, that added together give a palindrome (72027).

The spelling of 71663364 in words is "seventy-one million, six hundred sixty-three thousand, three hundred sixty-four".