66379959 has 32 divisors (see below), whose sum is σ = 103034880. Its totient is φ = 42184800.

The previous prime is 66379921. The next prime is 66379969. The reversal of 66379959 is 95997366.

It is not a de Polignac number, because 66379959 - 2⁹ = 66379447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66379919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58869 + ... + 59985.

It is an arithmetic number, because the mean of its divisors is an integer number (3219840).

Almost surely, 2^66379959 is an apocalyptic number.

66379959 is a deficient number, since it is larger than the sum of its proper divisors (36654921).

66379959 is a wasteful number, since it uses less digits than its factorization.

66379959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228 (or 1222 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The square root of 66379959 is about 8147.3897046846. The cubic root of 66379959 is about 404.8980264528.

The spelling of 66379959 in words is "sixty-six million, three hundred seventy-nine thousand, nine hundred fifty-nine".