71606691 has 12 divisors (see below), whose sum is σ = 111388368. Its totient is φ = 44065584.

The previous prime is 71606671. The next prime is 71606693. The reversal of 71606691 is 19660617.

It is not a de Polignac number, because 71606691 - 2¹⁴ = 71590307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71606693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305895 + ... + 306128.

It is an arithmetic number, because the mean of its divisors is an integer number (9282364).

Almost surely, 2^71606691 is an apocalyptic number.

71606691 is a deficient number, since it is larger than the sum of its proper divisors (39781677).

71606691 is a wasteful number, since it uses less digits than its factorization.

71606691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612042 (or 612039 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 71606691 is about 8462.0736820238. The cubic root of 71606691 is about 415.2578665435.

The spelling of 71606691 in words is "seventy-one million, six hundred six thousand, six hundred ninety-one".