66361895 has 8 divisors (see below), whose sum is σ = 79977456. Its totient is φ = 52860736.

The previous prime is 66361873. The next prime is 66361907. The reversal of 66361895 is 59816366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66361895 - 2¹⁰ = 66360871 is a prime.

It is a super-2 number, since 2×66361895² = 8807802215982050, which contains 22 as substring.

It is a Duffinian number.

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, 27317 + ... + 29646.

It is an arithmetic number, because the mean of its divisors is an integer number (9997182).

Almost surely, 2^66361895 is an apocalyptic number.

66361895 is a deficient number, since it is larger than the sum of its proper divisors (13615561).

66361895 is a wasteful number, since it uses less digits than its factorization.

66361895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57201.

The product of its digits is 233280, while the sum is 44.

The square root of 66361895 is about 8146.2810533396. The cubic root of 66361895 is about 404.8612947764.

The spelling of 66361895 in words is "sixty-six million, three hundred sixty-one thousand, eight hundred ninety-five".