61670856 has 64 divisors (see below), whose sum is σ = 167227200. Its totient is φ = 18839808.

The previous prime is 61670837. The next prime is 61670857. The reversal of 61670856 is 65807616.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (61670857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48355 + ... + 49613.

It is an arithmetic number, because the mean of its divisors is an integer number (2612925).

Almost surely, 2^61670856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61670856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83613600).

61670856 is an abundant number, since it is smaller than the sum of its proper divisors (105556344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61670856 is a wasteful number, since it uses less digits than its factorization.

61670856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 61670856 is about 7853.0793960077. The cubic root of 61670856 is about 395.0875328096.

It can be divided in two parts, 61670 and 856, that added together give a palindrome (62526).

The spelling of 61670856 in words is "sixty-one million, six hundred seventy thousand, eight hundred fifty-six".