66623430 has 32 divisors (see below), whose sum is σ = 160722144. Its totient is φ = 17674496.

The previous prime is 66623429. The next prime is 66623441. The reversal of 66623430 is 3432666.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274 + ... + 11546.

It is an arithmetic number, because the mean of its divisors is an integer number (5022567).

Almost surely, 2^66623430 is an apocalyptic number.

66623430 is an abundant number, since it is smaller than the sum of its proper divisors (94098714).

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

66623430 is a wasteful number, since it uses less digits than its factorization.

66623430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11480.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 66623430 is about 8162.3176855597. The cubic root of 66623430 is about 405.3924560344.

The spelling of 66623430 in words is "sixty-six million, six hundred twenty-three thousand, four hundred thirty".