61880070 has 64 divisors (see below), whose sum is σ = 173892096. Its totient is φ = 13797120.

The previous prime is 61880057. The next prime is 61880081. The reversal of 61880070 is 7008816.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5017 + ... + 12203.

It is an arithmetic number, because the mean of its divisors is an integer number (2717064).

Almost surely, 2^61880070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61880070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86946048).

61880070 is an abundant number, since it is smaller than the sum of its proper divisors (112012026).

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

61880070 is a wasteful number, since it uses less digits than its factorization.

61880070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7245.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 61880070 is about 7866.3886250299. The cubic root of 61880070 is about 395.5337973497.

Adding to 61880070 its reverse (7008816), we get a palindrome (68888886).

The spelling of 61880070 in words is "sixty-one million, eight hundred eighty thousand, seventy".