71378766 has 32 divisors (see below), whose sum is σ = 159033600. Its totient is φ = 23730840.

The previous prime is 71378761. The next prime is 71378789. The reversal of 71378766 is 66787317.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71378761) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22201 + ... + 25211.

It is an arithmetic number, because the mean of its divisors is an integer number (4969800).

Almost surely, 2^71378766 is an apocalyptic number.

71378766 is an abundant number, since it is smaller than the sum of its proper divisors (87654834).

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

71378766 is a wasteful number, since it uses less digits than its factorization.

71378766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461 (or 3455 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 71378766 is about 8448.5955045794. The cubic root of 71378766 is about 414.8168079059.

The spelling of 71378766 in words is "seventy-one million, three hundred seventy-eight thousand, seven hundred sixty-six".