40205721735066 has 8 divisors (see below), whose sum is σ = 80411443470144. Its totient is φ = 13401907245020.

The previous prime is 40205721735061. The next prime is 40205721735097. The reversal of 40205721735066 is 66053712750204.

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

40205721735066 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (40205721735061) 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, 3350476811250 + ... + 3350476811261.

It is an arithmetic number, because the mean of its divisors is an integer number (10051430433768).

Almost surely, 2^{40205721735066} is an apocalyptic number.

40205721735066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40205721735066 is a wasteful number, since it uses less digits than its factorization.

40205721735066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700953622516.

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 40205721735066 in words is "forty trillion, two hundred five billion, seven hundred twenty-one million, seven hundred thirty-five thousand, sixty-six".