66020264 has 8 divisors (see below), whose sum is σ = 123788010. Its totient is φ = 33010128.

The previous prime is 66020243. The next prime is 66020287. The reversal of 66020264 is 46202066.

It can be written as a sum of positive squares in only one way, i.e., 62568100 + 3452164 = 7910^2 + 1858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4126259 + ... + 4126274.

Almost surely, 2^66020264 is an apocalyptic number.

It is an amenable number.

66020264 is a deficient number, since it is larger than the sum of its proper divisors (57767746).

66020264 is a wasteful number, since it uses less digits than its factorization.

66020264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8252539 (or 8252535 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66020264 is about 8125.2854719080. The cubic root of 66020264 is about 404.1653572683.

The spelling of 66020264 in words is "sixty-six million, twenty thousand, two hundred sixty-four".