66571074 has 48 divisors (see below), whose sum is σ = 151766784. Its totient is φ = 21060000.

The previous prime is 66571073. The next prime is 66571081. The reversal of 66571074 is 47017566.

It is not an unprimeable number, because it can be changed into a prime (66571073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28449 + ... + 30699.

It is an arithmetic number, because the mean of its divisors is an integer number (3161808).

Almost surely, 2^66571074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66571074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75883392).

66571074 is an abundant number, since it is smaller than the sum of its proper divisors (85195710).

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

66571074 is a wasteful number, since it uses less digits than its factorization.

66571074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2340 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 66571074 is about 8159.1098779217. The cubic root of 66571074 is about 405.2862356969.

The spelling of 66571074 in words is "sixty-six million, five hundred seventy-one thousand, seventy-four".