80670815 has 4 divisors (see below), whose sum is σ = 96804984. Its totient is φ = 64536648.

The previous prime is 80670803. The next prime is 80670817. The reversal of 80670815 is 51807608.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80670815 - 2¹⁰ = 80669791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80670817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8067077 + ... + 8067086.

It is an arithmetic number, because the mean of its divisors is an integer number (24201246).

Almost surely, 2^80670815 is an apocalyptic number.

80670815 is a deficient number, since it is larger than the sum of its proper divisors (16134169).

80670815 is a wasteful number, since it uses less digits than its factorization.

80670815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16134168.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 80670815 is about 8981.6933258712. The cubic root of 80670815 is about 432.0879432728.

The spelling of 80670815 in words is "eighty million, six hundred seventy thousand, eight hundred fifteen".