61666662 has 16 divisors (see below), whose sum is σ = 123805440. Its totient is φ = 20476872.

The previous prime is 61666651. The next prime is 61666681. The reversal of 61666662 is 26666616.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 61666662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17962 + ... + 21117.

It is an arithmetic number, because the mean of its divisors is an integer number (7737840).

Almost surely, 2^61666662 is an apocalyptic number.

61666662 is an abundant number, since it is smaller than the sum of its proper divisors (62138778).

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

61666662 is a wasteful number, since it uses less digits than its factorization.

61666662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39347.

The product of its digits is 93312, while the sum is 39.

The square root of 61666662 is about 7852.8123624597. The cubic root of 61666662 is about 395.0785764739.

The spelling of 61666662 in words is "sixty-one million, six hundred sixty-six thousand, six hundred sixty-two".