61680790 has 8 divisors (see below), whose sum is σ = 111025440. Its totient is φ = 24672312.

The previous prime is 61680781. The next prime is 61680797. The reversal of 61680790 is 9708616.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61680797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3084030 + ... + 3084049.

It is an arithmetic number, because the mean of its divisors is an integer number (13878180).

Almost surely, 2^61680790 is an apocalyptic number.

61680790 is a deficient number, since it is larger than the sum of its proper divisors (49344650).

61680790 is a wasteful number, since it uses less digits than its factorization.

61680790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6168086.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 61680790 is about 7853.7118612794. The cubic root of 61680790 is about 395.1087453622.

It can be divided in two parts, 616 and 80790, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 61680790 in words is "sixty-one million, six hundred eighty thousand, seven hundred ninety".