66961152 has 54 divisors (see below), whose sum is σ = 193072152. Its totient is φ = 22319616.

The previous prime is 66961133. The next prime is 66961177. The reversal of 66961152 is 25116966.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12228 + ... + 16835.

Almost surely, 2^66961152 is an apocalyptic number.

It is an amenable number.

66961152 is an abundant number, since it is smaller than the sum of its proper divisors (126111000).

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

66961152 is a wasteful number, since it uses less digits than its factorization.

66961152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29085 (or 29068 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 66961152 is about 8182.9794085040. The cubic root of 66961152 is about 406.0762958527.

The spelling of 66961152 in words is "sixty-six million, nine hundred sixty-one thousand, one hundred fifty-two".