61681870 has 8 divisors (see below), whose sum is σ = 111027384. Its totient is φ = 24672744.

The previous prime is 61681853. The next prime is 61681897. The reversal of 61681870 is 7818616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3084084 + ... + 3084103.

It is an arithmetic number, because the mean of its divisors is an integer number (13878423).

Almost surely, 2^61681870 is an apocalyptic number.

61681870 is a deficient number, since it is larger than the sum of its proper divisors (49345514).

61681870 is a wasteful number, since it uses less digits than its factorization.

61681870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6168194.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 61681870 is about 7853.7806182755. The cubic root of 61681870 is about 395.1110514014. Note that the first 3 decimals are identical.

The spelling of 61681870 in words is "sixty-one million, six hundred eighty-one thousand, eight hundred seventy".