40506651 has 12 divisors (see below), whose sum is σ = 61589320. Its totient is φ = 25583040.

The previous prime is 40506643. The next prime is 40506671. The reversal of 40506651 is 15660504.

It is a happy number.

40506651 is a `hidden beast` number, since 4 + 0 + 5 + 0 + 6 + 651 = 666.

It is not a de Polignac number, because 40506651 - 2³ = 40506643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40506671) 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, 118270 + ... + 118611.

Almost surely, 2^40506651 is an apocalyptic number.

40506651 is a deficient number, since it is larger than the sum of its proper divisors (21082669).

40506651 is a wasteful number, since it uses less digits than its factorization.

40506651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236906 (or 236903 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 40506651 is about 6364.4835611383. The cubic root of 40506651 is about 343.4330704887.

It can be divided in two parts, 4050 and 6651, that added together give a palindrome (10701).

The spelling of 40506651 in words is "forty million, five hundred six thousand, six hundred fifty-one".