65761969 has 12 divisors (see below), whose sum is σ = 82383924. Its totient is φ = 52030944.

The previous prime is 65761957. The next prime is 65761973. The reversal of 65761969 is 96916756.

It can be written as a sum of positive squares in 2 ways, for example, as 42837025 + 22924944 = 6545^2 + 4788^2 .

It is not a de Polignac number, because 65761969 - 2¹⁵ = 65729201 is a prime.

It is a super-2 number, since 2×65761969² = 8649273133513922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (65761999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50982 + ... + 52255.

It is an arithmetic number, because the mean of its divisors is an integer number (6865327).

Almost surely, 2^65761969 is an apocalyptic number.

It is an amenable number.

65761969 is a deficient number, since it is larger than the sum of its proper divisors (16621955).

65761969 is a wasteful number, since it uses less digits than its factorization.

65761969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103264 (or 103257 counting only the distinct ones).

The product of its digits is 612360, while the sum is 49.

The square root of 65761969 is about 8109.3753766859. The cubic root of 65761969 is about 403.6375883509.

It can be divided in two parts, 657 and 61969, that added together give a palindrome (62626).

The spelling of 65761969 in words is "sixty-five million, seven hundred sixty-one thousand, nine hundred sixty-nine".