61666070 has 16 divisors (see below), whose sum is σ = 111196800. Its totient is φ = 24622464.

The previous prime is 61666067. The next prime is 61666079. The reversal of 61666070 is 7066616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61666079) 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, 731 + ... + 11129.

It is an arithmetic number, because the mean of its divisors is an integer number (6949800).

Almost surely, 2^61666070 is an apocalyptic number.

61666070 is a deficient number, since it is larger than the sum of its proper divisors (49530730).

61666070 is a wasteful number, since it uses less digits than its factorization.

61666070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 61666070 is about 7852.7746688670. The cubic root of 61666070 is about 395.0773122183.

The spelling of 61666070 in words is "sixty-one million, six hundred sixty-six thousand, seventy".