61666466 has 4 divisors (see below), whose sum is σ = 92499702. Its totient is φ = 30833232.

The previous prime is 61666453. The next prime is 61666483. The reversal of 61666466 is 66466616.

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

It can be written as a sum of positive squares in only one way, i.e., 60295225 + 1371241 = 7765^2 + 1171^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15416615 + ... + 15416618.

Almost surely, 2^61666466 is an apocalyptic number.

61666466 is a deficient number, since it is larger than the sum of its proper divisors (30833236).

61666466 is a wasteful number, since it uses less digits than its factorization.

61666466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30833235.

The product of its digits is 186624, while the sum is 41.

The square root of 61666466 is about 7852.7998828443. The cubic root of 61666466 is about 395.0781579037.

The spelling of 61666466 in words is "sixty-one million, six hundred sixty-six thousand, four hundred sixty-six".