61705666 has 16 divisors (see below), whose sum is σ = 101126880. Its totient is φ = 28005280.

The previous prime is 61705639. The next prime is 61705667. The reversal of 61705666 is 66650716.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61705667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16065 + ... + 19531.

It is an arithmetic number, because the mean of its divisors is an integer number (6320430).

Almost surely, 2^61705666 is an apocalyptic number.

61705666 is a deficient number, since it is larger than the sum of its proper divisors (39421214).

61705666 is a wasteful number, since it uses less digits than its factorization.

61705666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 61705666 is about 7855.2954113770. The cubic root of 61705666 is about 395.1618543023.

The spelling of 61705666 in words is "sixty-one million, seven hundred five thousand, six hundred sixty-six".