666022802 has 4 divisors (see below), whose sum is σ = 999034206. Its totient is φ = 333011400.

The previous prime is 666022801. The next prime is 666022831. The reversal of 666022802 is 208220666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 208220666 = 2 ⋅104110333.

It can be written as a sum of positive squares in only one way, i.e., 625050001 + 40972801 = 25001^2 + 6401^2 .

It is not an unprimeable number, because it can be changed into a prime (666022801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166505699 + ... + 166505702.

Almost surely, 2^666022802 is an apocalyptic number.

666022802 is a deficient number, since it is larger than the sum of its proper divisors (333011404).

666022802 is a wasteful number, since it uses less digits than its factorization.

666022802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333011403.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 666022802 is about 25807.4175771231. The cubic root of 666022802 is about 873.2991403521.

The spelling of 666022802 in words is "six hundred sixty-six million, twenty-two thousand, eight hundred two".