66540741542 has 32 divisors (see below), whose sum is σ = 110071764000. Its totient is φ = 29917785600.

The previous prime is 66540741499. The next prime is 66540741559. The reversal of 66540741542 is 24514704566.

It is a junction number, because it is equal to n+sod(n) for n = 66540741493 and 66540741502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 747884 + ... + 832112.

It is an arithmetic number, because the mean of its divisors is an integer number (3439742625).

Almost surely, 2^66540741542 is an apocalyptic number.

66540741542 is a deficient number, since it is larger than the sum of its proper divisors (43531022458).

66540741542 is a wasteful number, since it uses less digits than its factorization.

66540741542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84632.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 66540741542 in words is "sixty-six billion, five hundred forty million, seven hundred forty-one thousand, five hundred forty-two".