661470147 has 24 divisors (see below), whose sum is σ = 1035795488. Its totient is φ = 404352000.

The previous prime is 661470107. The next prime is 661470197. The reversal of 661470147 is 741074166.

It is not a de Polignac number, because 661470147 - 2⁶ = 661470083 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (661470107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1054 + ... + 36387.

Almost surely, 2^661470147 is an apocalyptic number.

661470147 is a deficient number, since it is larger than the sum of its proper divisors (374325341).

661470147 is a wasteful number, since it uses less digits than its factorization.

661470147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37611 (or 37608 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 661470147 is about 25719.0619385700. The cubic root of 661470147 is about 871.3047525297.

The spelling of 661470147 in words is "six hundred sixty-one million, four hundred seventy thousand, one hundred forty-seven".