61668196 has 12 divisors (see below), whose sum is σ = 110836348. Its totient is φ = 30000672.

The previous prime is 61668193. The next prime is 61668209. The reversal of 61668196 is 69186616.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47334400 + 14333796 = 6880^2 + 3786^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61668193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208191 + ... + 208486.

Almost surely, 2^61668196 is an apocalyptic number.

It is an amenable number.

61668196 is a deficient number, since it is larger than the sum of its proper divisors (49168152).

61668196 is a wasteful number, since it uses less digits than its factorization.

61668196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416718 (or 416716 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 61668196 is about 7852.9100338664. The cubic root of 61668196 is about 395.0818523958.

The spelling of 61668196 in words is "sixty-one million, six hundred sixty-eight thousand, one hundred ninety-six".