61497668 has 6 divisors (see below), whose sum is σ = 107620926. Its totient is φ = 30748832.

The previous prime is 61497659. The next prime is 61497673. The reversal of 61497668 is 86679416.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47224384 + 14273284 = 6872^2 + 3778^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7687205 + ... + 7687212.

It is an arithmetic number, because the mean of its divisors is an integer number (17936821).

Almost surely, 2^61497668 is an apocalyptic number.

It is an amenable number.

61497668 is a deficient number, since it is larger than the sum of its proper divisors (46123258).

61497668 is a wasteful number, since it uses less digits than its factorization.

61497668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15374421 (or 15374419 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 61497668 is about 7842.0448863801. The cubic root of 61497668 is about 394.7173494661.

The spelling of 61497668 in words is "sixty-one million, four hundred ninety-seven thousand, six hundred sixty-eight".