66250774 has 4 divisors (see below), whose sum is σ = 99376164. Its totient is φ = 33125386.

The previous prime is 66250753. The next prime is 66250801. The reversal of 66250774 is 47705266.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16562692 + ... + 16562695.

It is an arithmetic number, because the mean of its divisors is an integer number (24844041).

Almost surely, 2^66250774 is an apocalyptic number.

66250774 is a deficient number, since it is larger than the sum of its proper divisors (33125390).

66250774 is a wasteful number, since it uses less digits than its factorization.

66250774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33125389.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 66250774 is about 8139.4578443530. The cubic root of 66250774 is about 404.6351925029.

The spelling of 66250774 in words is "sixty-six million, two hundred fifty thousand, seven hundred seventy-four".