66996154 has 16 divisors (see below), whose sum is σ = 102103848. Its totient is φ = 32965632.

The previous prime is 66996143. The next prime is 66996161. The reversal of 66996154 is 45169966.

It can be written as a sum of positive squares in 4 ways, for example, as 56595529 + 10400625 = 7523^2 + 3225^2 .

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, 37342 + ... + 39094.

Almost surely, 2^66996154 is an apocalyptic number.

66996154 is a deficient number, since it is larger than the sum of its proper divisors (35107694).

66996154 is a wasteful number, since it uses less digits than its factorization.

66996154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049.

The product of its digits is 349920, while the sum is 46.

The square root of 66996154 is about 8185.1178366594. The cubic root of 66996154 is about 406.1470383964.

The spelling of 66996154 in words is "sixty-six million, nine hundred ninety-six thousand, one hundred fifty-four".