61668501 has 16 divisors (see below), whose sum is σ = 83211648. Its totient is φ = 40622400.

The previous prime is 61668473. The next prime is 61668527. The reversal of 61668501 is 10586616.

It is not a de Polignac number, because 61668501 - 2⁹ = 61667989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61668301) 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, 146271 + ... + 146691.

It is an arithmetic number, because the mean of its divisors is an integer number (5200728).

Almost surely, 2^61668501 is an apocalyptic number.

It is an amenable number.

61668501 is a deficient number, since it is larger than the sum of its proper divisors (21543147).

61668501 is a wasteful number, since it uses less digits than its factorization.

With its successor (61668502) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (892).

61668501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 61668501 is about 7852.9294533951. The cubic root of 61668501 is about 395.0825037298.

The spelling of 61668501 in words is "sixty-one million, six hundred sixty-eight thousand, five hundred one".