66761152 has 28 divisors (see below), whose sum is σ = 133731000. Its totient is φ = 33065216.

The previous prime is 66761143. The next prime is 66761153. The reversal of 66761152 is 25116766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66761153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1974 + ... + 11722.

Almost surely, 2^66761152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66761152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66865500).

66761152 is an abundant number, since it is smaller than the sum of its proper divisors (66969848).

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

66761152 is a wasteful number, since it uses less digits than its factorization.

66761152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9868 (or 9858 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 66761152 is about 8170.7497819968. The cubic root of 66761152 is about 405.6716022392.

The spelling of 66761152 in words is "sixty-six million, seven hundred sixty-one thousand, one hundred fifty-two".