66523374 has 48 divisors (see below), whose sum is σ = 148498272. Its totient is φ = 21513024.

The previous prime is 66523349. The next prime is 66523393. The reversal of 66523374 is 47332566.

66523374 is a `hidden beast` number, since 66 + 523 + 3 + 74 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97924 + ... + 98600.

It is an arithmetic number, because the mean of its divisors is an integer number (3093714).

Almost surely, 2^66523374 is an apocalyptic number.

66523374 is an abundant number, since it is smaller than the sum of its proper divisors (81974898).

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

66523374 is a wasteful number, since it uses less digits than its factorization.

66523374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841 (or 838 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 66523374 is about 8156.1862411301. The cubic root of 66523374 is about 405.1894130007.

The spelling of 66523374 in words is "sixty-six million, five hundred twenty-three thousand, three hundred seventy-four".