66799902 has 32 divisors (see below), whose sum is σ = 152343072. Its totient is φ = 19344384.

The previous prime is 66799897. The next prime is 66799921. The reversal of 66799902 is 20999766.

It is a happy number.

It is a congruent number.

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, 23863 + ... + 26514.

It is an arithmetic number, because the mean of its divisors is an integer number (4760721).

Almost surely, 2^66799902 is an apocalyptic number.

66799902 is an abundant number, since it is smaller than the sum of its proper divisors (85543170).

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

66799902 is a wasteful number, since it uses less digits than its factorization.

66799902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50412.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 66799902 is about 8173.1207014212. The cubic root of 66799902 is about 405.7500746926.

The spelling of 66799902 in words is "sixty-six million, seven hundred ninety-nine thousand, nine hundred two".