66249902 has 16 divisors (see below), whose sum is σ = 100759680. Its totient is φ = 32666808.

The previous prime is 66249889. The next prime is 66249907. The reversal of 66249902 is 20994266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66249907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45713 + ... + 47139.

It is an arithmetic number, because the mean of its divisors is an integer number (6297480).

Almost surely, 2^66249902 is an apocalyptic number.

66249902 is a deficient number, since it is larger than the sum of its proper divisors (34509778).

66249902 is a wasteful number, since it uses less digits than its factorization.

66249902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 66249902 is about 8139.4042779555. The cubic root of 66249902 is about 404.6334172108.

The spelling of 66249902 in words is "sixty-six million, two hundred forty-nine thousand, nine hundred two".