40256663 has 4 divisors (see below), whose sum is σ = 42624720. Its totient is φ = 37888608.

The previous prime is 40256659. The next prime is 40256677. The reversal of 40256663 is 36665204.

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

It is a cyclic number.

It is not a de Polignac number, because 40256663 - 2² = 40256659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40256063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1184003 + ... + 1184036.

It is an arithmetic number, because the mean of its divisors is an integer number (10656180).

Almost surely, 2^40256663 is an apocalyptic number.

40256663 is a deficient number, since it is larger than the sum of its proper divisors (2368057).

40256663 is a wasteful number, since it uses less digits than its factorization.

40256663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368056.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 40256663 is about 6344.8138664582. The cubic root of 40256663 is about 342.7251096189.

The spelling of 40256663 in words is "forty million, two hundred fifty-six thousand, six hundred sixty-three".