66494151 has 12 divisors (see below), whose sum is σ = 96580120. Its totient is φ = 44083440.

The previous prime is 66494117. The next prime is 66494177. The reversal of 66494151 is 15149466.

66494151 is a `hidden beast` number, since 6 + 649 + 4 + 1 + 5 + 1 = 666.

It is not a de Polignac number, because 66494151 - 2¹⁴ = 66477767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66494111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18781 + ... + 22038.

Almost surely, 2^66494151 is an apocalyptic number.

66494151 is a deficient number, since it is larger than the sum of its proper divisors (30085969).

66494151 is a wasteful number, since it uses less digits than its factorization.

66494151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41006 (or 41003 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 66494151 is about 8154.3945820643. The cubic root of 66494151 is about 405.1300725324.

The spelling of 66494151 in words is "sixty-six million, four hundred ninety-four thousand, one hundred fifty-one".