66013595890 has 32 divisors (see below), whose sum is σ = 129639844224. Its totient is φ = 24002509440.

The previous prime is 66013595887. The next prime is 66013595891. The reversal of 66013595890 is 9859531066.

It is not an unprimeable number, because it can be changed into a prime (66013595891) 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, 1337227 + ... + 1385713.

It is an arithmetic number, because the mean of its divisors is an integer number (4051245132).

Almost surely, 2^66013595890 is an apocalyptic number.

66013595890 is a deficient number, since it is larger than the sum of its proper divisors (63626248334).

66013595890 is a wasteful number, since it uses less digits than its factorization.

66013595890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60882.

The product of its (nonzero) digits is 1749600, while the sum is 52.

The spelling of 66013595890 in words is "sixty-six billion, thirteen million, five hundred ninety-five thousand, eight hundred ninety".