66949288 has 48 divisors (see below), whose sum is σ = 146851380. Its totient is φ = 28530432.

The previous prime is 66949277. The next prime is 66949301. The reversal of 66949288 is 88294966.

It can be written as a sum of positive squares in 2 ways, for example, as 65254084 + 1695204 = 8078^2 + 1302^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90970 + ... + 91702.

Almost surely, 2^66949288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66949288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73425690).

66949288 is an abundant number, since it is smaller than the sum of its proper divisors (79902092).

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

66949288 is a wasteful number, since it uses less digits than its factorization.

66949288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 975 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 52.

The square root of 66949288 is about 8182.2544570552. The cubic root of 66949288 is about 406.0523119277.

The spelling of 66949288 in words is "sixty-six million, nine hundred forty-nine thousand, two hundred eighty-eight".