145603966 has 4 divisors (see below), whose sum is σ = 218405952. Its totient is φ = 72801982.

The previous prime is 145603957. The next prime is 145603967. The reversal of 145603966 is 669306541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669306541 = 17 ⋅39370973.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145603967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36400990 + ... + 36400993.

It is an arithmetic number, because the mean of its divisors is an integer number (54601488).

Almost surely, 2^145603966 is an apocalyptic number.

145603966 is a deficient number, since it is larger than the sum of its proper divisors (72801986).

145603966 is an equidigital number, since it uses as much as digits as its factorization.

145603966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72801985.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 145603966 is about 12066.6468416043. The cubic root of 145603966 is about 526.0871994687.

The spelling of 145603966 in words is "one hundred forty-five million, six hundred three thousand, nine hundred sixty-six".