61706040 has 64 divisors (see below), whose sum is σ = 201951360. Its totient is φ = 14958720.

The previous prime is 61706017. The next prime is 61706041. The reversal of 61706040 is 4060716.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 61706040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61706041) 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, 22054 + ... + 24693.

It is an arithmetic number, because the mean of its divisors is an integer number (3155490).

Almost surely, 2^61706040 is an apocalyptic number.

61706040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61706040 is an abundant number, since it is smaller than the sum of its proper divisors (140245320).

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

61706040 is a wasteful number, since it uses less digits than its factorization.

61706040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46772 (or 46768 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 61706040 is about 7855.3192169383. The cubic root of 61706040 is about 395.1626526635.

Adding to 61706040 its reverse (4060716), we get a palindrome (65766756).

The spelling of 61706040 in words is "sixty-one million, seven hundred six thousand, forty".