80670720 has 208 divisors, whose sum is σ = 280721952. Its totient is φ = 19660800.

The previous prime is 80670691. The next prime is 80670749. The reversal of 80670720 is 2707608.

It is an interprime number because it is at equal distance from previous prime (80670691) and next prime (80670749).

It is a tau number, because it is divible by the number of its divisors (208).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 798670 + ... + 798770.

Almost surely, 2^80670720 is an apocalyptic number.

80670720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80670720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140360976).

80670720 is an abundant number, since it is smaller than the sum of its proper divisors (200051232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80670720 is a wasteful number, since it uses less digits than its factorization.

80670720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 80670720 is about 8981.6880373346. The cubic root of 80670720 is about 432.0877736602.

The spelling of 80670720 in words is "eighty million, six hundred seventy thousand, seven hundred twenty".