66154464 has 36 divisors (see below), whose sum is σ = 188127576. Its totient is φ = 22051392.

The previous prime is 66154457. The next prime is 66154469. The reversal of 66154464 is 46445166.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66154469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114564 + ... + 115139.

It is an arithmetic number, because the mean of its divisors is an integer number (5225766).

Almost surely, 2^66154464 is an apocalyptic number.

It is an amenable number.

66154464 is an abundant number, since it is smaller than the sum of its proper divisors (121973112).

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

66154464 is a wasteful number, since it uses less digits than its factorization.

66154464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229719 (or 229708 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 66154464 is about 8133.5394509402. The cubic root of 66154464 is about 404.4390221424.

The spelling of 66154464 in words is "sixty-six million, one hundred fifty-four thousand, four hundred sixty-four".