61622665 has 8 divisors (see below), whose sum is σ = 79635528. Its totient is φ = 45505920.

The previous prime is 61622663. The next prime is 61622669. The reversal of 61622665 is 56622616.

It can be written as a sum of positive squares in 4 ways, for example, as 2471184 + 59151481 = 1572^2 + 7691^2 .

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

It is not a de Polignac number, because 61622665 - 2¹ = 61622663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61622665.

It is not an unprimeable number, because it can be changed into a prime (61622663) 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, 473956 + ... + 474085.

It is an arithmetic number, because the mean of its divisors is an integer number (9954441).

Almost surely, 2^61622665 is an apocalyptic number.

61622665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61622665 is a deficient number, since it is larger than the sum of its proper divisors (18012863).

61622665 is a wasteful number, since it uses less digits than its factorization.

61622665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948059.

The product of its digits is 25920, while the sum is 34.

The square root of 61622665 is about 7850.0105095471. The cubic root of 61622665 is about 394.9845958849.

The spelling of 61622665 in words is "sixty-one million, six hundred twenty-two thousand, six hundred sixty-five".