66241615 has 16 divisors (see below), whose sum is σ = 86935680. Its totient is φ = 48053920.

The previous prime is 66241583. The next prime is 66241621. The reversal of 66241615 is 51614266.

It is not a de Polignac number, because 66241615 - 2⁵ = 66241583 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, 24396 + ... + 26974.

It is an arithmetic number, because the mean of its divisors is an integer number (5433480).

Almost surely, 2^66241615 is an apocalyptic number.

66241615 is a deficient number, since it is larger than the sum of its proper divisors (20694065).

66241615 is a wasteful number, since it uses less digits than its factorization.

66241615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3062.

The product of its digits is 8640, while the sum is 31.

The square root of 66241615 is about 8138.8951952952. The cubic root of 66241615 is about 404.6165450502.

The spelling of 66241615 in words is "sixty-six million, two hundred forty-one thousand, six hundred fifteen".