61662621 has 16 divisors (see below), whose sum is σ = 87922368. Its totient is φ = 38304000.

The previous prime is 61662583. The next prime is 61662641. The reversal of 61662621 is 12626616.

It is not a de Polignac number, because 61662621 - 2⁹ = 61662109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61662641) 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, 835 + ... + 11136.

It is an arithmetic number, because the mean of its divisors is an integer number (5495148).

Almost surely, 2^61662621 is an apocalyptic number.

It is an amenable number.

61662621 is a deficient number, since it is larger than the sum of its proper divisors (26259747).

61662621 is a wasteful number, since it uses less digits than its factorization.

61662621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12092.

The product of its digits is 5184, while the sum is 30.

The square root of 61662621 is about 7852.5550618891. Note that the first 3 decimals coincide. The cubic root of 61662621 is about 395.0699464873.

The spelling of 61662621 in words is "sixty-one million, six hundred sixty-two thousand, six hundred twenty-one".