40266621 has 12 divisors (see below), whose sum is σ = 58288672. Its totient is φ = 26786376.

The previous prime is 40266617. The next prime is 40266637. The reversal of 40266621 is 12666204.

It is a happy number.

It is not a de Polignac number, because 40266621 - 2² = 40266617 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 (40266641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211 + ... + 8976.

Almost surely, 2^40266621 is an apocalyptic number.

It is an amenable number.

40266621 is a deficient number, since it is larger than the sum of its proper divisors (18022051).

40266621 is a wasteful number, since it uses less digits than its factorization.

40266621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9680 (or 9677 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 40266621 is about 6345.5985533281. The cubic root of 40266621 is about 342.7533664343.

The spelling of 40266621 in words is "forty million, two hundred sixty-six thousand, six hundred twenty-one".