67720470 has 32 divisors (see below), whose sum is σ = 163725408. Its totient is φ = 17925888.

The previous prime is 67720403. The next prime is 67720483. The reversal of 67720470 is 7402776.

It is a happy number.

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, 4129 + ... + 12348.

It is an arithmetic number, because the mean of its divisors is an integer number (5116419).

Almost surely, 2^67720470 is an apocalyptic number.

67720470 is an abundant number, since it is smaller than the sum of its proper divisors (96004938).

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

67720470 is a wasteful number, since it uses less digits than its factorization.

67720470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16624.

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 67720470 is about 8229.2448013168. The cubic root of 67720470 is about 407.6054552872.

The spelling of 67720470 in words is "sixty-seven million, seven hundred twenty thousand, four hundred seventy".