66015795 has 16 divisors (see below), whose sum is σ = 105910272. Its totient is φ = 35113440.

The previous prime is 66015787. The next prime is 66015799. The reversal of 66015795 is 59751066.

66015795 is a nontrivial binomial coefficient, being equal to C(11491, 2).

It is not a de Polignac number, because 66015795 - 2³ = 66015787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66015799) 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, 1 + ... + 11490.

It is an arithmetic number, because the mean of its divisors is an integer number (6619392).

Almost surely, 2^66015795 is an apocalyptic number.

66015795 is the 11490-th triangular number.

66015795 is a deficient number, since it is larger than the sum of its proper divisors (39894477).

66015795 is a wasteful number, since it uses less digits than its factorization.

66015795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11882.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 66015795 is about 8125.0104615317. The cubic root of 66015795 is about 404.1562375646.

The spelling of 66015795 in words is "sixty-six million, fifteen thousand, seven hundred ninety-five".