40551566 has 8 divisors (see below), whose sum is σ = 66357144. Its totient is φ = 18432520.

The previous prime is 40551557. The next prime is 40551587. The reversal of 40551566 is 66515504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921605 + ... + 921648.

It is an arithmetic number, because the mean of its divisors is an integer number (8294643).

Almost surely, 2^40551566 is an apocalyptic number.

40551566 is a deficient number, since it is larger than the sum of its proper divisors (25805578).

40551566 is a wasteful number, since it uses less digits than its factorization.

40551566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843266.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 40551566 is about 6368.0111494877. The cubic root of 40551566 is about 343.5599599266.

The spelling of 40551566 in words is "forty million, five hundred fifty-one thousand, five hundred sixty-six".