66099770 has 32 divisors (see below), whose sum is σ = 130403520. Its totient is φ = 23923840.

The previous prime is 66099767. The next prime is 66099779. The reversal of 66099770 is 7799066.

It is not an unprimeable number, because it can be changed into a prime (66099779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24341 + ... + 26919.

It is an arithmetic number, because the mean of its divisors is an integer number (4075110).

Almost surely, 2^66099770 is an apocalyptic number.

66099770 is a deficient number, since it is larger than the sum of its proper divisors (64303750).

66099770 is a wasteful number, since it uses less digits than its factorization.

66099770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 66099770 is about 8130.1765048491. The cubic root of 66099770 is about 404.3275331340.

The spelling of 66099770 in words is "sixty-six million, ninety-nine thousand, seven hundred seventy".