97447666 has 4 divisors (see below), whose sum is σ = 146171502. Its totient is φ = 48723832.

The previous prime is 97447661. The next prime is 97447687. The reversal of 97447666 is 66674479.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66674479 = 1229 ⋅54251.

It can be written as a sum of positive squares in only one way, i.e., 97436641 + 11025 = 9871^2 + 105^2 .

It is not an unprimeable number, because it can be changed into a prime (97447661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24361915 + ... + 24361918.

Almost surely, 2^97447666 is an apocalyptic number.

97447666 is a deficient number, since it is larger than the sum of its proper divisors (48723836).

97447666 is a wasteful number, since it uses less digits than its factorization.

97447666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48723835.

The product of its digits is 1524096, while the sum is 49.

The square root of 97447666 is about 9871.5584382609. The cubic root of 97447666 is about 460.1758401470.

The spelling of 97447666 in words is "ninety-seven million, four hundred forty-seven thousand, six hundred sixty-six".