66740152 has 8 divisors (see below), whose sum is σ = 125137800. Its totient is φ = 33370072.

The previous prime is 66740143. The next prime is 66740153. The reversal of 66740152 is 25104766.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66740153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4171252 + ... + 4171267.

It is an arithmetic number, because the mean of its divisors is an integer number (15642225).

Almost surely, 2^66740152 is an apocalyptic number.

It is an amenable number.

66740152 is a deficient number, since it is larger than the sum of its proper divisors (58397648).

66740152 is a wasteful number, since it uses less digits than its factorization.

66740152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8342525 (or 8342521 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 66740152 is about 8169.4646091406. The cubic root of 66740152 is about 405.6290625446.

The spelling of 66740152 in words is "sixty-six million, seven hundred forty thousand, one hundred fifty-two".