67166628 has 12 divisors (see below), whose sum is σ = 156722160. Its totient is φ = 22388872.

The previous prime is 67166623. The next prime is 67166633. The reversal of 67166628 is 82666176.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67166623) and next prime (67166633).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×67166628² = 9022711833780768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67166628.

It is not an unprimeable number, because it can be changed into a prime (67166623) 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, 2798598 + ... + 2798621.

It is an arithmetic number, because the mean of its divisors is an integer number (13060180).

Almost surely, 2^67166628 is an apocalyptic number.

It is an amenable number.

67166628 is an abundant number, since it is smaller than the sum of its proper divisors (89555532).

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

67166628 is a wasteful number, since it uses less digits than its factorization.

67166628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597226 (or 5597224 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 67166628 is about 8195.5248764188. The cubic root of 67166628 is about 406.4912316236.

The spelling of 67166628 in words is "sixty-seven million, one hundred sixty-six thousand, six hundred twenty-eight".