66534974 has 32 divisors (see below), whose sum is σ = 116906976. Its totient is φ = 28062720.

The previous prime is 66534943. The next prime is 66534983. The reversal of 66534974 is 47943566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26084 + ... + 28520.

It is an arithmetic number, because the mean of its divisors is an integer number (3653343).

Almost surely, 2^66534974 is an apocalyptic number.

66534974 is a deficient number, since it is larger than the sum of its proper divisors (50372002).

66534974 is a wasteful number, since it uses less digits than its factorization.

66534974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540.

The product of its digits is 544320, while the sum is 44.

The square root of 66534974 is about 8156.8973268026. The cubic root of 66534974 is about 405.2129632394.

The spelling of 66534974 in words is "sixty-six million, five hundred thirty-four thousand, nine hundred seventy-four".