40402664566 has 16 divisors (see below), whose sum is σ = 66125018448. Its totient is φ = 18361634400.

The previous prime is 40402664557. The next prime is 40402664569. The reversal of 40402664566 is 66546620404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402664569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29685 + ... + 285808.

It is an arithmetic number, because the mean of its divisors is an integer number (4132813653).

Almost surely, 2^40402664566 is an apocalyptic number.

40402664566 is a deficient number, since it is larger than the sum of its proper divisors (25722353882).

40402664566 is a wasteful number, since it uses less digits than its factorization.

40402664566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321327.

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 40402664566 in words is "forty billion, four hundred two million, six hundred sixty-four thousand, five hundred sixty-six".