66207195895 has 16 divisors (see below), whose sum is σ = 87022848960. Its totient is φ = 48131152384.

The previous prime is 66207195871. The next prime is 66207195919. The reversal of 66207195895 is 59859170266.

It is an interprime number because it is at equal distance from previous prime (66207195871) and next prime (66207195919).

It is a cyclic number.

It is not a de Polignac number, because 66207195895 - 2⁵ = 66207195863 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13426987 + ... + 13431916.

It is an arithmetic number, because the mean of its divisors is an integer number (5438928060).

Almost surely, 2^66207195895 is an apocalyptic number.

66207195895 is a deficient number, since it is larger than the sum of its proper divisors (20815653065).

66207195895 is a wasteful number, since it uses less digits than its factorization.

66207195895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26858954.

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 66207195895 in words is "sixty-six billion, two hundred seven million, one hundred ninety-five thousand, eight hundred ninety-five".