80670691 has 2 divisors, whose sum is σ = 80670692. Its totient is φ = 80670690.

The previous prime is 80670671. The next prime is 80670749. The reversal of 80670691 is 19607608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80670691 - 2¹⁵ = 80637923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80670691.

It is not a weakly prime, because it can be changed into another prime (80670631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40335345 + 40335346.

It is an arithmetic number, because the mean of its divisors is an integer number (40335346).

Almost surely, 2^80670691 is an apocalyptic number.

80670691 is a deficient number, since it is larger than the sum of its proper divisors (1).

80670691 is an equidigital number, since it uses as much as digits as its factorization.

80670691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 80670691 is about 8981.6864229386. The cubic root of 80670691 is about 432.0877218836.

The spelling of 80670691 in words is "eighty million, six hundred seventy thousand, six hundred ninety-one".