66973542 has 16 divisors (see below), whose sum is σ = 134067312. Its totient is φ = 22304480.

The previous prime is 66973507. The next prime is 66973573. The reversal of 66973542 is 24537966.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 66973494 and 66973503.

It is a congruent number.

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, 3292 + ... + 12032.

It is an arithmetic number, because the mean of its divisors is an integer number (8379207).

Almost surely, 2^66973542 is an apocalyptic number.

66973542 is an abundant number, since it is smaller than the sum of its proper divisors (67093770).

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

66973542 is a wasteful number, since it uses less digits than its factorization.

66973542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10023.

The product of its digits is 272160, while the sum is 42.

The square root of 66973542 is about 8183.7364327060. The cubic root of 66973542 is about 406.1013401003.

The spelling of 66973542 in words is "sixty-six million, nine hundred seventy-three thousand, five hundred forty-two".