6651812 has 6 divisors (see below), whose sum is σ = 11640678. Its totient is φ = 3325904.

The previous prime is 6651809. The next prime is 6651839. The reversal of 6651812 is 2181566.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4946176 + 1705636 = 2224^2 + 1306^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831473 + ... + 831480.

It is an arithmetic number, because the mean of its divisors is an integer number (1940113).

Almost surely, 2^6651812 is an apocalyptic number.

It is an amenable number.

6651812 is a deficient number, since it is larger than the sum of its proper divisors (4988866).

6651812 is a wasteful number, since it uses less digits than its factorization.

6651812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662957 (or 1662955 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 6651812 is about 2579.1106994466. The cubic root of 6651812 is about 188.0673140572.

It can be divided in two parts, 66518 and 12, that multiplied together give a triangular number (798216 = T₁₂₆₃).

The spelling of 6651812 in words is "six million, six hundred fifty-one thousand, eight hundred twelve".