40752661 has 4 divisors (see below), whose sum is σ = 40847212. Its totient is φ = 40658112.

The previous prime is 40752653. The next prime is 40752667. The reversal of 40752661 is 16625704.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12460900 + 28291761 = 3530^2 + 5319^2 .

It is a cyclic number.

It is not a de Polignac number, because 40752661 - 2³ = 40752653 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 (40752667) 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, 46626 + ... + 47491.

It is an arithmetic number, because the mean of its divisors is an integer number (10211803).

Almost surely, 2^40752661 is an apocalyptic number.

It is an amenable number.

40752661 is a deficient number, since it is larger than the sum of its proper divisors (94551).

40752661 is an equidigital number, since it uses as much as digits as its factorization.

40752661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94550.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 40752661 is about 6383.7810896051. The cubic root of 40752661 is about 344.1269277643.

The spelling of 40752661 in words is "forty million, seven hundred fifty-two thousand, six hundred sixty-one".