145706465666 has 4 divisors (see below), whose sum is σ = 218559698502. Its totient is φ = 72853232832.

The previous prime is 145706465633. The next prime is 145706465683. The reversal of 145706465666 is 666564607541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666564607541 = 7 ⋅95223515363.

It can be written as a sum of positive squares in only one way, i.e., 98561463025 + 47145002641 = 313945^2 + 217129^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36426616415 + ... + 36426616418.

Almost surely, 2^145706465666 is an apocalyptic number.

145706465666 is a deficient number, since it is larger than the sum of its proper divisors (72853232836).

145706465666 is an equidigital number, since it uses as much as digits as its factorization.

145706465666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72853232835.

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 145706465666 in words is "one hundred forty-five billion, seven hundred six million, four hundred sixty-five thousand, six hundred sixty-six".