67664552 has 8 divisors (see below), whose sum is σ = 126871050. Its totient is φ = 33832272.

The previous prime is 67664543. The next prime is 67664561. The reversal of 67664552 is 25546676.

It is an interprime number because it is at equal distance from previous prime (67664543) and next prime (67664561).

It can be written as a sum of positive squares in only one way, i.e., 37039396 + 30625156 = 6086^2 + 5534^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4229027 + ... + 4229042.

Almost surely, 2^67664552 is an apocalyptic number.

It is an amenable number.

67664552 is a deficient number, since it is larger than the sum of its proper divisors (59206498).

67664552 is a wasteful number, since it uses less digits than its factorization.

67664552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8458075 (or 8458071 counting only the distinct ones).

The product of its digits is 302400, while the sum is 41.

The square root of 67664552 is about 8225.8465825713. The cubic root of 67664552 is about 407.4932353626.

The spelling of 67664552 in words is "sixty-seven million, six hundred sixty-four thousand, five hundred fifty-two".