61667678 has 8 divisors (see below), whose sum is σ = 95001672. Its totient is φ = 30000456.

The previous prime is 61667591. The next prime is 61667701. The reversal of 61667678 is 87676616.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416600 + ... + 416747.

It is an arithmetic number, because the mean of its divisors is an integer number (11875209).

Almost surely, 2^61667678 is an apocalyptic number.

61667678 is a deficient number, since it is larger than the sum of its proper divisors (33333994).

61667678 is a wasteful number, since it uses less digits than its factorization.

61667678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833386.

The product of its digits is 508032, while the sum is 47.

The square root of 61667678 is about 7852.8770523930. The cubic root of 61667678 is about 395.0807461910.

The spelling of 61667678 in words is "sixty-one million, six hundred sixty-seven thousand, six hundred seventy-eight".