40756661 has 16 divisors (see below), whose sum is σ = 46891008. Its totient is φ = 35079600.

The previous prime is 40756649. The next prime is 40756663. The reversal of 40756661 is 16665704.

It is a de Polignac number, because none of the positive numbers 2^k-40756661 is a prime.

It is a super-3 number, since 3×40756661³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40756663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14756 + ... + 17298.

It is an arithmetic number, because the mean of its divisors is an integer number (2930688).

Almost surely, 2^40756661 is an apocalyptic number.

It is an amenable number.

40756661 is a deficient number, since it is larger than the sum of its proper divisors (6134347).

40756661 is a wasteful number, since it uses less digits than its factorization.

40756661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 40756661 is about 6384.0943758688. The cubic root of 40756661 is about 344.1381864375.

The spelling of 40756661 in words is "forty million, seven hundred fifty-six thousand, six hundred sixty-one".