80644663 has 8 divisors (see below), whose sum is σ = 90122256. Its totient is φ = 71524800.

The previous prime is 80644657. The next prime is 80644667. The reversal of 80644663 is 36644608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80644663 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 (80644667) 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, 88956 + ... + 89857.

It is an arithmetic number, because the mean of its divisors is an integer number (11265282).

Almost surely, 2^80644663 is an apocalyptic number.

80644663 is a deficient number, since it is larger than the sum of its proper divisors (9477593).

80644663 is a wasteful number, since it uses less digits than its factorization.

80644663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178865.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 80644663 is about 8980.2373576649. The cubic root of 80644663 is about 432.0412465618.

The spelling of 80644663 in words is "eighty million, six hundred forty-four thousand, six hundred sixty-three".