40773661 has 4 divisors (see below), whose sum is σ = 41464800. Its totient is φ = 40082524.

The previous prime is 40773647. The next prime is 40773673. The reversal of 40773661 is 16637704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40773661 - 2⁷ = 40773533 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 (40773631) 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, 345481 + ... + 345598.

It is an arithmetic number, because the mean of its divisors is an integer number (10366200).

Almost surely, 2^40773661 is an apocalyptic number.

It is an amenable number.

40773661 is a deficient number, since it is larger than the sum of its proper divisors (691139).

40773661 is an equidigital number, since it uses as much as digits as its factorization.

40773661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691138.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 40773661 is about 6385.4256710105. The cubic root of 40773661 is about 344.1860275822.

The spelling of 40773661 in words is "forty million, seven hundred seventy-three thousand, six hundred sixty-one".