71663090 has 16 divisors (see below), whose sum is σ = 129850560. Its totient is φ = 28474800.

The previous prime is 71663087. The next prime is 71663099. The reversal of 71663090 is 9036617.

It is not an unprimeable number, because it can be changed into a prime (71663099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22220 + ... + 25239.

It is an arithmetic number, because the mean of its divisors is an integer number (8115660).

Almost surely, 2^71663090 is an apocalyptic number.

71663090 is a deficient number, since it is larger than the sum of its proper divisors (58187470).

71663090 is a wasteful number, since it uses less digits than its factorization.

71663090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47617.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 71663090 is about 8465.4054834958. The cubic root of 71663090 is about 415.3668600004.

The spelling of 71663090 in words is "seventy-one million, six hundred sixty-three thousand, ninety".