66291354 has 12 divisors (see below), whose sum is σ = 143631306. Its totient is φ = 22097112.

The previous prime is 66291343. The next prime is 66291377. The reversal of 66291354 is 45319266.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47238129 + 19053225 = 6873^2 + 4365^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1841409 + ... + 1841444.

Almost surely, 2^66291354 is an apocalyptic number.

66291354 is an abundant number, since it is smaller than the sum of its proper divisors (77339952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66291354 is a wasteful number, since it uses less digits than its factorization.

66291354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682861 (or 3682858 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 66291354 is about 8141.9502577699. The cubic root of 66291354 is about 404.7177915112.

The spelling of 66291354 in words is "sixty-six million, two hundred ninety-one thousand, three hundred fifty-four".