67576720 has 20 divisors (see below), whose sum is σ = 157116060. Its totient is φ = 27030656.

The previous prime is 67576709. The next prime is 67576723. The reversal of 67576720 is 2767576.

It can be written as a sum of positive squares in 2 ways, for example, as 19079424 + 48497296 = 4368^2 + 6964^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×67576720² = 9133226171916800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (67576723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422275 + ... + 422434.

It is an arithmetic number, because the mean of its divisors is an integer number (7855803).

Almost surely, 2^67576720 is an apocalyptic number.

It is an amenable number.

67576720 is an abundant number, since it is smaller than the sum of its proper divisors (89539340).

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

67576720 is a wasteful number, since it uses less digits than its factorization.

67576720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844722 (or 844716 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 67576720 is about 8220.5060671470. The cubic root of 67576720 is about 407.3168434306.

The spelling of 67576720 in words is "sixty-seven million, five hundred seventy-six thousand, seven hundred twenty".