61668499 has 8 divisors (see below), whose sum is σ = 62831792. Its totient is φ = 60510240.

The previous prime is 61668473. The next prime is 61668527. The reversal of 61668499 is 99486616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61668499 - 2⁹ = 61667987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61668449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30937 + ... + 32869.

It is an arithmetic number, because the mean of its divisors is an integer number (7853974).

Almost surely, 2^61668499 is an apocalyptic number.

61668499 is a deficient number, since it is larger than the sum of its proper divisors (1163293).

61668499 is a wasteful number, since it uses less digits than its factorization.

61668499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517.

The product of its digits is 559872, while the sum is 49.

The square root of 61668499 is about 7852.9293260541. The cubic root of 61668499 is about 395.0824994587.

The spelling of 61668499 in words is "sixty-one million, six hundred sixty-eight thousand, four hundred ninety-nine".