40756668 has 12 divisors (see below), whose sum is σ = 95098920. Its totient is φ = 13585552.

The previous prime is 40756663. The next prime is 40756699. The reversal of 40756668 is 86665704.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×40756668² = 3322211972924448, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1698183 + ... + 1698206.

It is an arithmetic number, because the mean of its divisors is an integer number (7924910).

Almost surely, 2^40756668 is an apocalyptic number.

It is an amenable number.

40756668 is an abundant number, since it is smaller than the sum of its proper divisors (54342252).

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

40756668 is a wasteful number, since it uses less digits than its factorization.

40756668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396396 (or 3396394 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 40756668 is about 6384.0949241063. The cubic root of 40756668 is about 344.1382061396.

It can be divided in two parts, 407 and 56668, that added together give a palindrome (57075).

The spelling of 40756668 in words is "forty million, seven hundred fifty-six thousand, six hundred sixty-eight".