67720980 has 48 divisors (see below), whose sum is σ = 192737664. Its totient is φ = 17761920.

The previous prime is 67720973. The next prime is 67720999. The reversal of 67720980 is 8902776.

It is a super-2 number, since 2×67720980² = 9172262264320800, which contains 22 as substring.

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, 5592 + ... + 12911.

It is an arithmetic number, because the mean of its divisors is an integer number (4015368).

Almost surely, 2^67720980 is an apocalyptic number.

67720980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67720980 is an abundant number, since it is smaller than the sum of its proper divisors (125016684).

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

67720980 is a wasteful number, since it uses less digits than its factorization.

67720980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18576 (or 18574 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 67720980 is about 8229.2757883060. The cubic root of 67720980 is about 407.6064785045.

The spelling of 67720980 in words is "sixty-seven million, seven hundred twenty thousand, nine hundred eighty".