66853572 has 12 divisors (see below), whose sum is σ = 155991696. Its totient is φ = 22284520.

The previous prime is 66853547. The next prime is 66853597. The reversal of 66853572 is 27535866.

It is an interprime number because it is at equal distance from previous prime (66853547) and next prime (66853597).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2785554 + ... + 2785577.

It is an arithmetic number, because the mean of its divisors is an integer number (12999308).

Almost surely, 2^66853572 is an apocalyptic number.

It is an amenable number.

66853572 is an abundant number, since it is smaller than the sum of its proper divisors (89138124).

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

66853572 is a wasteful number, since it uses less digits than its factorization.

66853572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571138 (or 5571136 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 66853572 is about 8176.4033657838. The cubic root of 66853572 is about 405.8587114638.

The spelling of 66853572 in words is "sixty-six million, eight hundred fifty-three thousand, five hundred seventy-two".