65551651 has 8 divisors (see below), whose sum is σ = 73174464. Its totient is φ = 58206120.

The previous prime is 65551621. The next prime is 65551693. The reversal of 65551651 is 15615556.

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 65551651 - 2⁷ = 65551523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65551601) 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, 68821 + ... + 69766.

It is an arithmetic number, because the mean of its divisors is an integer number (9146808).

Almost surely, 2^65551651 is an apocalyptic number.

65551651 is a deficient number, since it is larger than the sum of its proper divisors (7622813).

65551651 is a wasteful number, since it uses less digits than its factorization.

65551651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138641.

The product of its digits is 22500, while the sum is 34.

The square root of 65551651 is about 8096.3974087245. The cubic root of 65551651 is about 403.2068281780.

The spelling of 65551651 in words is "sixty-five million, five hundred fifty-one thousand, six hundred fifty-one".