102772066 has 4 divisors (see below), whose sum is σ = 154158102. Its totient is φ = 51386032.

The previous prime is 102772063. The next prime is 102772079. The reversal of 102772066 is 660277201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 101909025 + 863041 = 10095^2 + 929^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (102772063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25693015 + ... + 25693018.

Almost surely, 2^102772066 is an apocalyptic number.

102772066 is a deficient number, since it is larger than the sum of its proper divisors (51386036).

102772066 is an equidigital number, since it uses as much as digits as its factorization.

102772066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51386035.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 102772066 is about 10137.6558434384. The cubic root of 102772066 is about 468.4087821719.

The spelling of 102772066 in words is "one hundred two million, seven hundred seventy-two thousand, sixty-six".