66351264 has 48 divisors (see below), whose sum is σ = 199055808. Its totient is φ = 18957312.

The previous prime is 66351247. The next prime is 66351281. The reversal of 66351264 is 46215366.

It is an interprime number because it is at equal distance from previous prime (66351247) and next prime (66351281).

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48697 + ... + 50040.

It is an arithmetic number, because the mean of its divisors is an integer number (4146996).

Almost surely, 2^66351264 is an apocalyptic number.

It is an amenable number.

66351264 is an abundant number, since it is smaller than the sum of its proper divisors (132704544).

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

66351264 is a wasteful number, since it uses less digits than its factorization.

66351264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98757 (or 98749 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 66351264 is about 8145.6285208693. The cubic root of 66351264 is about 404.8396743858.

The spelling of 66351264 in words is "sixty-six million, three hundred fifty-one thousand, two hundred sixty-four".