40157432666 has 16 divisors (see below), whose sum is σ = 66622935624. Its totient is φ = 18033274944.

The previous prime is 40157432599. The next prime is 40157432671. The reversal of 40157432666 is 66623475104.

40157432666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 22837556641 + 17319876025 = 151121^2 + 131605^2 .

It is a super-2 number, since 2×40157432666² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20870885 + ... + 20872808.

Almost surely, 2^40157432666 is an apocalyptic number.

40157432666 is a deficient number, since it is larger than the sum of its proper divisors (26465502958).

40157432666 is a wasteful number, since it uses less digits than its factorization.

40157432666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41743745.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 40157432666 in words is "forty billion, one hundred fifty-seven million, four hundred thirty-two thousand, six hundred sixty-six".