40668669 has 32 divisors (see below), whose sum is σ = 64373760. Its totient is φ = 25313904.

The previous prime is 40668653. The next prime is 40668671. The reversal of 40668669 is 96686604.

It is not a de Polignac number, because 40668669 - 2⁴ = 40668653 is a prime.

It is a super-2 number, since 2×40668669² = 3307881276463122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40668629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25942 + ... + 27464.

It is an arithmetic number, because the mean of its divisors is an integer number (2011680).

Almost surely, 2^40668669 is an apocalyptic number.

It is an amenable number.

40668669 is a deficient number, since it is larger than the sum of its proper divisors (23705091).

40668669 is a wasteful number, since it uses less digits than its factorization.

40668669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1592 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 40668669 is about 6377.1991500972. The cubic root of 40668669 is about 343.8903478033.

The spelling of 40668669 in words is "forty million, six hundred sixty-eight thousand, six hundred sixty-nine".