66990202 has 16 divisors (see below), whose sum is σ = 104623272. Its totient is φ = 32140800.

The previous prime is 66990199. The next prime is 66990221. The reversal of 66990202 is 20209966.

It can be written as a sum of positive squares in 4 ways, for example, as 64496961 + 2493241 = 8031^2 + 1579^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799 + ... + 11602.

Almost surely, 2^66990202 is an apocalyptic number.

66990202 is a deficient number, since it is larger than the sum of its proper divisors (37633070).

66990202 is a wasteful number, since it uses less digits than its factorization.

66990202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12513.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 66990202 is about 8184.7542418817. The cubic root of 66990202 is about 406.1350105479.

The spelling of 66990202 in words is "sixty-six million, nine hundred ninety thousand, two hundred two".