40356551666 has 8 divisors (see below), whose sum is σ = 60897312000. Its totient is φ = 20057447668.

The previous prime is 40356551633. The next prime is 40356551671. The reversal of 40356551666 is 66615565304.

40356551666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40356551666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60413666 + ... + 60414333.

It is an arithmetic number, because the mean of its divisors is an integer number (7612164000).

Almost surely, 2^40356551666 is an apocalyptic number.

40356551666 is a deficient number, since it is larger than the sum of its proper divisors (20540760334).

40356551666 is a wasteful number, since it uses less digits than its factorization.

40356551666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120828168.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 40356551666 in words is "forty billion, three hundred fifty-six million, five hundred fifty-one thousand, six hundred sixty-six".