147031666 has 4 divisors (see below), whose sum is σ = 220547502. Its totient is φ = 73515832.

The previous prime is 147031639. The next prime is 147031693. The reversal of 147031666 is 666130741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666130741 = 6079 ⋅109579.

It is an interprime number because it is at equal distance from previous prime (147031639) and next prime (147031693).

It can be written as a sum of positive squares in only one way, i.e., 142301041 + 4730625 = 11929^2 + 2175^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36757915 + ... + 36757918.

Almost surely, 2^147031666 is an apocalyptic number.

147031666 is a deficient number, since it is larger than the sum of its proper divisors (73515836).

147031666 is an equidigital number, since it uses as much as digits as its factorization.

147031666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73515835.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 147031666 is about 12125.6614664933. The cubic root of 147031666 is about 527.8011021008.

The spelling of 147031666 in words is "one hundred forty-seven million, thirty-one thousand, six hundred sixty-six".