61939166 has 4 divisors (see below), whose sum is σ = 92908752. Its totient is φ = 30969582.

The previous prime is 61939127. The next prime is 61939181. The reversal of 61939166 is 66193916.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15484790 + ... + 15484793.

It is an arithmetic number, because the mean of its divisors is an integer number (23227188).

Almost surely, 2^61939166 is an apocalyptic number.

61939166 is a deficient number, since it is larger than the sum of its proper divisors (30969586).

61939166 is a wasteful number, since it uses less digits than its factorization.

61939166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30969585.

The product of its digits is 52488, while the sum is 41.

The square root of 61939166 is about 7870.1439631051. The cubic root of 61939166 is about 395.6596700165.

The spelling of 61939166 in words is "sixty-one million, nine hundred thirty-nine thousand, one hundred sixty-six".