64669275 has 144 divisors (see below), whose sum is σ = 141017760. Its totient is φ = 27955200.

The previous prime is 64669273. The next prime is 64669277. The reversal of 64669275 is 57296646.

It is an interprime number because it is at equal distance from previous prime (64669273) and next prime (64669277).

It is not a de Polignac number, because 64669275 - 2¹ = 64669273 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (544320) is a multiple of the sum of its prime factors (126).

It is a self number, because there is not a number n which added to its sum of digits gives 64669275.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64669273) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1220149 + ... + 1220201.

It is an arithmetic number, because the mean of its divisors is an integer number (979290).

Almost surely, 2^64669275 is an apocalyptic number.

64669275 is an abundant number, since it is smaller than the sum of its proper divisors (76348485).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64669275 is a wasteful number, since it uses less digits than its factorization.

64669275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 118 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 64669275 is about 8041.7208979173. The cubic root of 64669275 is about 401.3894906173.

The spelling of 64669275 in words is "sixty-four million, six hundred sixty-nine thousand, two hundred seventy-five".