66619152 has 40 divisors (see below), whose sum is σ = 191222880. Its totient is φ = 22206240.

The previous prime is 66619151. The next prime is 66619159. The reversal of 66619152 is 25191666.

It is a super-2 number, since 2×66619152² = 8876222826398208, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (66619151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76674 + ... + 77537.

It is an arithmetic number, because the mean of its divisors is an integer number (4780572).

Almost surely, 2^66619152 is an apocalyptic number.

It is an amenable number.

66619152 is an abundant number, since it is smaller than the sum of its proper divisors (124603728).

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

66619152 is a wasteful number, since it uses less digits than its factorization.

66619152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154228 (or 154216 counting only the distinct ones).

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

The square root of 66619152 is about 8162.0556234321. The cubic root of 66619152 is about 405.3837788766.

The spelling of 66619152 in words is "sixty-six million, six hundred nineteen thousand, one hundred fifty-two".