66059990 has 16 divisors (see below), whose sum is σ = 120683952. Its totient is φ = 26029344.

The previous prime is 66059969. The next prime is 66060031. The reversal of 66059990 is 9995066.

It is a congruent number.

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, 48629 + ... + 49968.

It is an arithmetic number, because the mean of its divisors is an integer number (7542747).

Almost surely, 2^66059990 is an apocalyptic number.

66059990 is a deficient number, since it is larger than the sum of its proper divisors (54623962).

66059990 is a wasteful number, since it uses less digits than its factorization.

66059990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98671.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 66059990 is about 8127.7296953085. The cubic root of 66059990 is about 404.2464063922.

The spelling of 66059990 in words is "sixty-six million, fifty-nine thousand, nine hundred ninety".