66354040 has 32 divisors (see below), whose sum is σ = 150227280. Its totient is φ = 26376192.

The previous prime is 66354019. The next prime is 66354107. The reversal of 66354040 is 4045366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1432 + ... + 11608.

Almost surely, 2^66354040 is an apocalyptic number.

It is an amenable number.

66354040 is an abundant number, since it is smaller than the sum of its proper divisors (83873240).

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

66354040 is a wasteful number, since it uses less digits than its factorization.

66354040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10351 (or 10347 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 66354040 is about 8145.7989172333. The cubic root of 66354040 is about 404.8453201927.

The spelling of 66354040 in words is "sixty-six million, three hundred fifty-four thousand, forty".