66167808 has 176 divisors, whose sum is σ = 214591104. Its totient is φ = 17694720.

The previous prime is 66167789. The next prime is 66167819. The reversal of 66167808 is 80876166.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 66167808.

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, 365478 + ... + 365658.

Almost surely, 2^66167808 is an apocalyptic number.

66167808 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66167808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107295552).

66167808 is an abundant number, since it is smaller than the sum of its proper divisors (148423296).

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

66167808 is a wasteful number, since it uses less digits than its factorization.

66167808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 66167808 is about 8134.3597166587. The cubic root of 66167808 is about 404.4662134114.

The spelling of 66167808 in words is "sixty-six million, one hundred sixty-seven thousand, eight hundred eight".