67720772 has 24 divisors (see below), whose sum is σ = 135683520. Its totient is φ = 28971360.

The previous prime is 67720753. The next prime is 67720781. The reversal of 67720772 is 27702776.

It is a super-2 number, since 2×67720772² = 9172205920551968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16679 + ... + 20337.

It is an arithmetic number, because the mean of its divisors is an integer number (5653480).

Almost surely, 2^67720772 is an apocalyptic number.

It is an amenable number.

67720772 is an abundant number, since it is smaller than the sum of its proper divisors (67962748).

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

67720772 is a wasteful number, since it uses less digits than its factorization.

67720772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4331 (or 4329 counting only the distinct ones).

The product of its (nonzero) digits is 57624, while the sum is 38.

The square root of 67720772 is about 8229.2631504892. The cubic root of 67720772 is about 407.6060611930.

The spelling of 67720772 in words is "sixty-seven million, seven hundred twenty thousand, seven hundred seventy-two".