65557051 has 6 divisors (see below), whose sum is σ = 76260300. Its totient is φ = 56191716.

The previous prime is 65557039. The next prime is 65557097. The reversal of 65557051 is 15075556.

It is not a de Polignac number, because 65557051 - 2²¹ = 63459899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65556998 and 65557016.

It is not an unprimeable number, because it can be changed into a prime (65557001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 668901 + ... + 668998.

It is an arithmetic number, because the mean of its divisors is an integer number (12710050).

Almost surely, 2^65557051 is an apocalyptic number.

65557051 is a deficient number, since it is larger than the sum of its proper divisors (10703249).

65557051 is a wasteful number, since it uses less digits than its factorization.

65557051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337913 (or 1337906 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 65557051 is about 8096.7308835109. The cubic root of 65557051 is about 403.2178996362.

It can be divided in two parts, 6555 and 7051, that multiplied together give a triangular number (46219305 = T₉₆₁₄).

The spelling of 65557051 in words is "sixty-five million, five hundred fifty-seven thousand, fifty-one".