66574036 has 6 divisors (see below), whose sum is σ = 116504570. Its totient is φ = 33287016.

The previous prime is 66574031. The next prime is 66574061. The reversal of 66574036 is 63047566.

It can be written as a sum of positive squares in only one way, i.e., 63297936 + 3276100 = 7956^2 + 1810^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66573986 and 66574004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66574031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321751 + ... + 8321758.

Almost surely, 2^66574036 is an apocalyptic number.

It is an amenable number.

66574036 is a deficient number, since it is larger than the sum of its proper divisors (49930534).

66574036 is a wasteful number, since it uses less digits than its factorization.

66574036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16643513 (or 16643511 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 66574036 is about 8159.2913908010. The cubic root of 66574036 is about 405.2922465159.

The spelling of 66574036 in words is "sixty-six million, five hundred seventy-four thousand, thirty-six".