66494915 has 8 divisors (see below), whose sum is σ = 79879920. Its totient is φ = 53138592.

The previous prime is 66494903. The next prime is 66494929. The reversal of 66494915 is 51949466.

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 66494915 - 2¹⁰ = 66493891 is a prime.

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, 1685 + ... + 11654.

It is an arithmetic number, because the mean of its divisors is an integer number (9984990).

Almost surely, 2^66494915 is an apocalyptic number.

66494915 is a deficient number, since it is larger than the sum of its proper divisors (13385005).

66494915 is a wasteful number, since it uses less digits than its factorization.

66494915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14341.

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

The square root of 66494915 is about 8154.4414278355. The cubic root of 66494915 is about 405.1316241385.

The spelling of 66494915 in words is "sixty-six million, four hundred ninety-four thousand, nine hundred fifteen".