40127661 has 12 divisors (see below), whose sum is σ = 66242592. Its totient is φ = 22930056.

The previous prime is 40127657. The next prime is 40127687. The reversal of 40127661 is 16672104.

It is not a de Polignac number, because 40127661 - 2² = 40127657 is a prime.

It is a super-2 number, since 2×40127661² = 3220458354661842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40127641) 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, 318411 + ... + 318536.

It is an arithmetic number, because the mean of its divisors is an integer number (5520216).

Almost surely, 2^40127661 is an apocalyptic number.

It is an amenable number.

40127661 is a deficient number, since it is larger than the sum of its proper divisors (26114931).

40127661 is a wasteful number, since it uses less digits than its factorization.

40127661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636960 (or 636957 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 40127661 is about 6334.6397687635. The cubic root of 40127661 is about 342.3586316962.

Adding to 40127661 its reverse (16672104), we get a palindrome (56799765).

The spelling of 40127661 in words is "forty million, one hundred twenty-seven thousand, six hundred sixty-one".