40065554 has 4 divisors (see below), whose sum is σ = 60098334. Its totient is φ = 20032776.

The previous prime is 40065541. The next prime is 40065577. The reversal of 40065554 is 45556004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37884025 + 2181529 = 6155^2 + 1477^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016387 + ... + 10016390.

Almost surely, 2^40065554 is an apocalyptic number.

40065554 is a deficient number, since it is larger than the sum of its proper divisors (20032780).

40065554 is a wasteful number, since it uses less digits than its factorization.

40065554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20032779.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 40065554 is about 6329.7356974837. The cubic root of 40065554 is about 342.1819136401.

The spelling of 40065554 in words is "forty million, sixty-five thousand, five hundred fifty-four".