65621149 has 8 divisors (see below), whose sum is σ = 72002592. Its totient is φ = 59309040.

The previous prime is 65621131. The next prime is 65621183. The reversal of 65621149 is 94112656.

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 65621149 - 2¹⁵ = 65588381 is a prime.

It is a super-2 number, since 2×65621149² = 8612270392160402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65621249) 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, 15339 + ... + 19144.

It is an arithmetic number, because the mean of its divisors is an integer number (9000324).

Almost surely, 2^65621149 is an apocalyptic number.

It is an amenable number.

65621149 is a deficient number, since it is larger than the sum of its proper divisors (6381443).

65621149 is a wasteful number, since it uses less digits than its factorization.

65621149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34667.

The product of its digits is 12960, while the sum is 34.

The square root of 65621149 is about 8100.6881806424. The cubic root of 65621149 is about 403.3492714296.

The spelling of 65621149 in words is "sixty-five million, six hundred twenty-one thousand, one hundred forty-nine".