61690060 has 24 divisors (see below), whose sum is σ = 130888800. Its totient is φ = 24420864.

The previous prime is 61690043. The next prime is 61690061. The reversal of 61690060 is 6009616.

It is a happy number.

61690060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61690061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13960 + ... + 17839.

It is an arithmetic number, because the mean of its divisors is an integer number (5453700).

Almost surely, 2^61690060 is an apocalyptic number.

It is an amenable number.

61690060 is an abundant number, since it is smaller than the sum of its proper divisors (69198740).

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

61690060 is a wasteful number, since it uses less digits than its factorization.

61690060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31905 (or 31903 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 61690060 is about 7854.3020059073. The cubic root of 61690060 is about 395.1285379892.

Adding to 61690060 its reverse (6009616), we get a palindrome (67699676).

The spelling of 61690060 in words is "sixty-one million, six hundred ninety thousand, sixty".