67721252 has 12 divisors (see below), whose sum is σ = 118586076. Its totient is φ = 33839520.

The previous prime is 67721233. The next prime is 67721273. The reversal of 67721252 is 25212776.

It can be written as a sum of positive squares in 2 ways, for example, as 4104676 + 63616576 = 2026^2 + 7976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3602 + ... + 12182.

It is an arithmetic number, because the mean of its divisors is an integer number (9882173).

Almost surely, 2^67721252 is an apocalyptic number.

It is an amenable number.

67721252 is a deficient number, since it is larger than the sum of its proper divisors (50864824).

67721252 is a wasteful number, since it uses less digits than its factorization.

67721252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10558 (or 10556 counting only the distinct ones).

The product of its digits is 11760, while the sum is 32.

The square root of 67721252 is about 8229.2923146526. The cubic root of 67721252 is about 407.6070242183.

The spelling of 67721252 in words is "sixty-seven million, seven hundred twenty-one thousand, two hundred fifty-two".