766540157 has 2 divisors, whose sum is σ = 766540158. Its totient is φ = 766540156.

The previous prime is 766540129. The next prime is 766540171. The reversal of 766540157 is 751045667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544708921 + 221831236 = 23339^2 + 14894^2 .

It is a cyclic number.

It is not a de Polignac number, because 766540157 - 2¹⁴ = 766523773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766540057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383270078 + 383270079.

It is an arithmetic number, because the mean of its divisors is an integer number (383270079).

Almost surely, 2^766540157 is an apocalyptic number.

It is an amenable number.

766540157 is a deficient number, since it is larger than the sum of its proper divisors (1).

766540157 is an equidigital number, since it uses as much as digits as its factorization.

766540157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 766540157 is about 27686.4616193547. The cubic root of 766540157 is about 915.1907818811.

The spelling of 766540157 in words is "seven hundred sixty-six million, five hundred forty thousand, one hundred fifty-seven".